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AcelleMail vs SendGrid

AcelleMail vs SendGrid — self-hosted email marketing alongside cloud transactional email

Side-by-side comparison of AcelleMail (self-hosted PHP application, $74 one-time license, MySQL/MariaDB, plugin SDK) and SendGrid (Twilio cloud service since 2019, Email API + Marketing Campaigns, REST + SMTP relay). SendGrid remains a built-in sending driver in AcelleMail — many teams use both: AcelleMail for the marketing platform, SendGrid for transactional API delivery.

At a glance AcelleMail SendGrid
License model Commercial license — $74 Regular / $199 Extended on CodeCanyon. Full PHP source included; one-time payment with lifetime point + minor updates. Cloud SaaS subscription. Free trial (100 emails/day for 60 days per the product page); paid Email API and Marketing Campaigns tiers billed monthly through Twilio.
Hosting Self-hosted on Linux + PHP 8.1+ + MySQL/MariaDB. Single-tenant or multi-tenant on the same install (Extended). Cloud-only — operated by Twilio. No self-hosted distribution.
Stack PHP 8.1+ (Laravel-based), MySQL/MariaDB, optional Redis cache. Twilio-managed cloud infrastructure. Customer-side: REST API + SMTP relay; no stack to host.
Marketing platform Visual builder, automation flows (Automation2), segmentation, A/B testing, RSS-to-email, multi-language UI — all bundled. Marketing Campaigns is a separate product layer above Email API. Free tier per the product page: "6,000 emails per month and store up to 2,000 contacts." Higher tiers add automation, send-time optimization, and advanced analytics.
API surface REST API documented at /api (campaigns, lists, subscribers, automations, sending servers, reports). Same API the dashboard uses. REST API per twilio.com/docs/sendgrid/api-reference: Mail Send, Marketing Campaigns, Subusers, IP Management, Stats, Suppression, Templates, Email Validation, Domain Authentication, Event + Inbound Parse webhooks. SMTP relay supported.
Multi-tenancy / SaaS Extended License ($199) ships a multi-tenant layer — customer accounts, plans, 6 payment gateways, dunning, white-label. Subuser API allows per-subuser sending and stats isolation. SaaS-style billing of end customers is the integrator's responsibility.
Integration in AcelleMail AcelleMail bundles SendGrid as one of 8 built-in sending drivers (app/SendingServers/Drivers/Vendors/SendGrid/). Existing SendGrid keys can be paired with AcelleMail in minutes. SendGrid is the cloud sender behind that driver — the API contract is the same one documented at twilio.com/docs/sendgrid.
Feature parity

Feature-by-feature comparison

Roughly 30 attributes grouped into 7 categories, drawn from AcelleMail v4.2 and Mailchimp’s public feature documentation. Every ✓ can be verified against the cited source.

Email creation

Feature AcelleMail SendGrid Notes
Drag-and-drop email builder ✓ ✓ AcelleMail ships a visual block editor with mobile preview. SendGrid Marketing Campaigns includes its own drag-and-drop editor on the Marketing Campaigns paid tiers.
100+ pre-built templates ✓ ✓ AcelleMail bundles a starter template gallery. SendGrid Marketing Campaigns ships templates and a Design Library; transactional templates are managed via the Templates API.
Full HTML editor ✓ ✓ Both platforms let you edit raw HTML/CSS for campaigns and transactional sends.
Spintax / dynamic content ✓ ◐ AcelleMail includes spintax + per-subscriber merge fields. SendGrid Templates support Handlebars-style substitution and conditionals; spintax-style randomization is not in the published Templates API.
A/B testing ✓ ◐ AcelleMail supports subject-line and content split tests on every license. SendGrid Marketing Campaigns supports A/B testing on the paid Marketing Campaigns tiers.
Multi-language UI ✓ ◐ AcelleMail ships 18 locales for the admin UI. The SendGrid dashboard UI language follows the user account locale set in Twilio Console.

Lists & segmentation

Feature AcelleMail SendGrid Notes
Unlimited subscribers (software cap) ✓ ◐ AcelleMail imposes no software-side cap; limits come from the database and server. SendGrid Marketing Campaigns charges by contact storage tier ("store up to 2,000 contacts" on the Free tier per the product page).
Multiple lists ✓ ✓ Both support unlimited lists.
Advanced segmentation ✓ ✓ AcelleMail provides a visual segment builder over subscriber fields, behavior, tags, and date logic. SendGrid Marketing Campaigns supports segments built from contact properties and engagement events via the Segments API.
Tags ✓ ✓ Both support tag-style subscriber labeling. SendGrid Marketing Campaigns calls them Custom Fields and Lists.
Embeddable signup forms ✓ ✓ Both generate embeddable signup forms and double opt-in flows.
Bulk import (CSV / API) ✓ ✓ Both support bulk imports. AcelleMail accepts CSV/XLSX or direct DB seed; SendGrid supports CSV upload + the Recipients API.

Automation & flows

Feature AcelleMail SendGrid Notes
Visual workflow builder ✓ ✓ AcelleMail Automation2 ships trigger / wait / condition / send / tag-update / segment-move nodes. SendGrid Marketing Campaigns includes Automations on its paid Marketing Campaigns tiers.
Customer journey / multi-step flows ✓ ✓ Both platforms support multi-step journeys.
RSS-to-email ✓ ◐ AcelleMail can pull RSS feeds into scheduled campaigns. SendGrid customers typically build RSS-to-email by polling externally and POSTing to the Mail Send API.
Behavioral triggers (opens / clicks) ✓ ✓ AcelleMail exposes engagement events as automation triggers. SendGrid emits open and click events through the Event Webhook for downstream processing.

Deliverability

Feature AcelleMail SendGrid Notes
SPF / DKIM / DMARC tooling ✓ ✓ AcelleMail surfaces SPF/DKIM/DMARC record values per sending server. SendGrid offers Domain Authentication (DKIM/SPF) and Reverse DNS configuration in the dashboard.
Custom sending domain (return path) ✓ ✓ AcelleMail supports per-sending-server return path. SendGrid offers Link Branding and a custom return-path on Domain Authentication.
Multiple sending services ✓ ✗ AcelleMail ships 8 native drivers (SES, SendGrid, SparkPost, Mailgun, Elastic Email, Blastengine, Gmail, generic SMTP). SendGrid is itself the sending service — it does not relay through other providers.
IP warmup ✓ ✓ AcelleMail supports daily/hourly send caps per sending server for gradual warmup. SendGrid provides Automated IP Warmup on dedicated-IP plans per its IP Management API.
Click maps + spam scoring ✓ ◐ AcelleMail provides click heatmaps and SpamAssassin-style scoring on each campaign. SendGrid records click events in Stats; spam-score scanning is not in the public API.
Bounce / complaint webhook ingestion ✓ ✓ AcelleMail registers webhook endpoints for SES/SendGrid/Mailgun/etc. (see app/SendingServers/Webhooks/). SendGrid emits Event Webhook + Inbound Parse Webhook per its API reference.

Integrations

Feature AcelleMail SendGrid Notes
REST API ✓ ✓ AcelleMail's REST API is documented at /api. SendGrid's API reference is at twilio.com/docs/sendgrid/api-reference.
SMTP relay ◐ ✓ AcelleMail itself is a marketing platform; outbound SMTP is delegated to your sending server (which can be SendGrid). SendGrid offers SMTP relay endpoint smtp.sendgrid.net per its docs.
Webhooks ✓ ✓ AcelleMail emits outbound event webhooks (subscribe, unsubscribe, click, open, etc.). SendGrid emits Event Webhook for delivery events plus Inbound Parse Webhook for inbound mail.
WordPress / WooCommerce sync ✓ ◐ AcelleMail provides an official WordPress / WooCommerce plugin. SendGrid is reachable from WordPress via plugins like SMTP plugins; the SendGrid for WordPress plugin was deprecated by Twilio.
Zapier / Make / n8n ✓ ✓ Both are first-party listed on Zapier / Make / n8n.
Custom plugin SDK ✓ ✗ AcelleMail ships a four-pattern Hook system (REGISTRY, EVENT, FILTER, BEHAVIOR) — see Plugin SDK. SendGrid extension is via the public REST API; there is no in-process plugin runtime.

SaaS / multi-tenancy

Feature AcelleMail SendGrid Notes
Multi-tenant workspaces ✓ ◐ AcelleMail Extended ($199) ships a reseller layer with customer accounts, plans, and billing. SendGrid Subusers provide per-subuser sending isolation; reseller billing is built outside SendGrid.
Subscription plans + payment gateways ✓ ✗ AcelleMail bundles 6 payment gateways (Stripe, PayPal, Braintree, Razorpay, Paystack, Offline). SendGrid does not include subscription billing primitives for resellers of its own service.
White-label / remove vendor branding ✓ ◐ AcelleMail Extended removes branding for reseller use. SendGrid offers Link Branding for outbound emails; the dashboard remains SendGrid/Twilio-branded.
Reseller billing / dunning ✓ ✗ AcelleMail's Cashier package covers subscriptions, prorated upgrades, and dunning. SendGrid does not provide reseller billing primitives.

Operations

Feature AcelleMail SendGrid Notes
Self-hosted on your servers ✓ ✗ AcelleMail is a PHP application — runs under PHP-FPM + nginx/Apache on hardware you control. SendGrid is a Twilio-operated cloud service.
Cron / background workers ✓ ◐ AcelleMail relies on a system cron entry that triggers campaign workers. SendGrid customers run their own schedulers when triggering Mail Send / Single Sends; SendGrid hosts the actual delivery infrastructure.
On-premise / air-gapped deployment ✓ ✗ AcelleMail can run fully on-premise or in air-gapped environments. SendGrid is cloud-only.
GDPR data residency control ✓ ◐ AcelleMail data lives wherever you host the install. SendGrid is operated from Twilio infrastructure (US-headquartered); see twilio.com/legal/privacy for the published data-handling terms.

Cost & ownership

Feature AcelleMail SendGrid Notes
License model ✓ ◐ AcelleMail Regular is $74 one-time; Extended is $199 (includes lifetime point/minor updates + 6 months support). SendGrid is a recurring subscription billed by Twilio; specific tier costs vary — see sendgrid.com/pricing for current values.
Lifetime updates ✓ ✓ AcelleMail license includes lifetime point + minor releases. SendGrid customers receive product updates as part of the subscription.
Data export ownership ✓ ✓ AcelleMail runs on a database you control — full SQL access, CSV export, and REST API. SendGrid offers contact CSV export and Stats / Activity API endpoints.
Source code visibility ✓ ✗ AcelleMail ships full unencrypted PHP source. SendGrid is a closed-source cloud service; only the published REST/SMTP API surface is documented.
Total cost of ownership

3-year cost across three real scenarios

SendGrid is a cloud subscription billed monthly through Twilio; AcelleMail is a one-time license you self-host on a VPS plus a sending service (which can be SendGrid). The dollar values below assume Amazon SES at $0.10 per 1,000 emails for the AcelleMail rows; substitute SendGrid Email API or your preferred provider as needed. Specific SendGrid Marketing Campaigns tier prices change — consult sendgrid.com/pricing for current values.

Small business — 1,000 contacts, 4× sends/month

SendGrid — SendGrid Marketing Campaigns paid tier (above Free) SendGrid Marketing Campaigns Free covers 6,000 emails/month and 2,000 contacts. Once exceeded, upgrade to a paid Marketing Campaigns tier billed monthly.
Free tier may cover this scenario indefinitely if volume stays under 6,000 emails/month — verify against the current sendgrid.com/pricing thresholds.
AcelleMail — AcelleMail Regular License + small VPS + Amazon SES (or SendGrid Email API) $5/mo VPS + $0.40/mo SES (4,000 sends × $0.0001)
$74 license + $180 VPS + $14 SES = $268 total

At 1,000 contacts and 4 sends/month, both models are inexpensive. AcelleMail's $74 license is one-time; the recurring cost is your VPS + sending. SendGrid Marketing Campaigns Free may cover this volume; cost difference is small either way.

Growing newsletter — 10,000 contacts, 80,000 sends/month

SendGrid — SendGrid Marketing Campaigns paid tier scaled to 10K contacts + 80K sends Marketing Campaigns paid tier billed monthly per the published contact + send tier; consult sendgrid.com/pricing for the tier covering 10K contacts and 80K monthly sends.
Recurring monthly subscription × 36 months — verify against current pricing.
AcelleMail — AcelleMail Regular License + $10 VPS + Amazon SES $10/mo VPS + $8/mo SES (80,000 × $0.0001)
$74 license + $360 VPS + $288 SES = $722 total

At 10K contacts and 80K monthly sends, AcelleMail self-hosted on SES converges to roughly $20/month after the one-time license is amortized. The cost gap depends on the SendGrid Marketing Campaigns tier covering this volume.

Agency / SaaS — 50,000 contacts, 400,000 sends/month, 50 client tenants

SendGrid — SendGrid + custom multi-tenant integration layer SendGrid does not include reseller-billing primitives; agencies typically operate their own tenant layer over SendGrid Subusers. Costs include the SendGrid subscription tier covering aggregate volume + the agency's own billing/operations layer.
SendGrid subscription × 36 months + custom integration build/operations cost.
AcelleMail — AcelleMail Extended License + $20 VPS + Amazon SES (multi-tenant on a single instance) $20/mo VPS + $40/mo SES (400,000 × $0.0001) — covers all 50 tenants on one install.
$199 license + $720 VPS + $1,440 SES = $2,359 total

AcelleMail Extended ships a multi-tenant SaaS layer (customer accounts, plans, 6 payment gateways, dunning) bundled. SendGrid Subusers handle send isolation; the reseller billing layer is the integrator's build.

Migration playbook

SendGrid → AcelleMail in seven steps

Most teams cut over inside a week. The technical setup is half a day; the time-consuming step is rebuilding multi-step automations and templates.

  1. 1. Export from SendGrid

    In SendGrid Marketing Campaigns, export contacts as CSV from Contacts → All Contacts → Export to CSV. For programmatic export, the Marketing Campaigns Contacts API at GET /marketing/contacts returns subscriber records with custom fields. Export campaign HTML from each campaign's detail view; the Single Sends API can also retrieve campaign content. For transactional Templates, the Templates API returns versions and HTML.

  2. 2. Get AcelleMail

    Buy the Regular License — $74 on CodeCanyon. Download the ZIP, upload to your server, run the web installer (5 minutes — sets DB, admin user, cron). PHP 8.1+, MySQL ≥ 5.7 or MariaDB ≥ 10.3, ~512 MB RAM minimum. The installation guide walks through cPanel, DigitalOcean, AWS, and Docker.

  3. 3. Configure your sending service

    In Sending Servers → Add, you can keep using SendGrid: pick the SendGrid driver, paste your existing API key, and AcelleMail will route through the same sender you already trust. Or pick Amazon SES (cheapest), Mailgun, SparkPost, or generic SMTP. The 8 built-in drivers live in app/SendingServers/Drivers/Vendors/. Run the test-send to confirm.

  4. 4. Import contacts + custom fields

    In Lists → Create List, recreate your SendGrid lists with their custom-field schema (SendGrid Custom Fields map to AcelleMail subscriber custom fields one-to-one). Use Import → Upload CSV and map columns. Tags map directly. For lists over 100K contacts, use the chunked import or seed via the REST API.

  5. 5. Recreate templates and campaigns

    For Templates, paste your SendGrid HTML into AcelleMail's template editor. Substitution syntax differs: SendGrid Templates use Handlebars-style {{firstName}}; AcelleMail uses {{ subscriber.first_name }}. Subscriber-attribute access is equivalent. For Marketing Campaigns Automations, rebuild trigger flows in Automation → New Workflow using the visual builder.

  6. 6. Configure tracking + DKIM

    AcelleMail tracking is enabled by default per campaign (open pixel + link wrapping). DKIM signing is configured at the Sending Server level — paste the DNS records AcelleMail generates into your domain. If you continue using SendGrid as the sending driver, the existing SendGrid DKIM/SPF records keep working unchanged.

  7. 7. Test deliverability + cut over

    Send a test campaign to GlockApps or Mail-Tester (free). Aim for 9.5/10. Run the next live campaign from AcelleMail in parallel for one cycle, watch open/click rates against your prior baseline, then turn off SendGrid Marketing Campaigns. Most teams cut over inside a week. The transactional Email API can stay if you want — AcelleMail uses SendGrid as a sending driver with the same API key.
Operational fit

When self-hosting isn’t the right fit

Self-hosted email marketing is a tradeoff: lower cost and full ownership in exchange for operational responsibility. A managed SaaS may be the better choice for any of the situations below.

  • You don't want to operate any server infrastructure

    AcelleMail is a self-hosted PHP application — you provision a VPS, install PHP-FPM + a web server, point a domain, and maintain backups. Teams that prefer a fully managed cloud service with no servers to operate may pick SendGrid (or another cloud platform) and accept the recurring subscription cost. The tradeoff is between recurring SaaS spend and one-time license + ops responsibility.

  • Your traffic is dominated by transactional API sends

    SendGrid's core product is the transactional Email API (high-volume API + SMTP relay for app-generated mail like password resets, receipts, notifications). If your workload is 95% transactional and 5% marketing, paying for AcelleMail's marketing layer may be optional. Many teams use both: SendGrid for transactional traffic + AcelleMail for marketing campaigns, paired through AcelleMail's SendGrid sending driver.

  • You require a managed reputation / SOC 2 cloud sender

    SendGrid manages IP reputation, blocklist monitoring, and SOC 2 compliance for the cloud service. AcelleMail self-hosted relies on the underlying sending service (SES, SendGrid, Mailgun, etc.) for IP reputation; the application layer doesn't replace the deliverability work that a managed cloud provider does on shared/dedicated IP pools.

  • You need 24/7 vendor support included

    AcelleMail bundles 6 months of email support with each license; ongoing support is community-driven via the CodeCanyon comments and knowledge base. SendGrid offers higher-tier support plans (Standard, Premier) bundled with paid tiers. Teams with strict 24/7 SLA requirements typically pair AcelleMail with a separate SLA-backed sending service like AWS SES or SendGrid itself.

Cost by use-case

Three buyer situations

Cost figures pair the verified entry-tier prices with calculator-quoted ranges where applicable. Compare the numbers; the right pick depends on your team’s capacity for the operational tradeoffs above.

  • SaaS team — transactional + product newsletter

    Situation: 8,000 trial signups + 2,000 paid customers, 50,000 transactional emails/month (signup, password reset, billing), 10,000 marketing emails/month (weekly newsletter + 4-step onboarding drip).

    SendGrid cost: SendGrid Email API tier covering 50K transactional sends + Marketing Campaigns paid tier covering 2K contacts + 10K sends. Both billed monthly through Twilio.

    AcelleMail cost: $74 once + $10/mo VPS + ~$6/mo SES (60K sends × $0.0001). Or keep SendGrid as the sending driver in AcelleMail and pay SendGrid only for the transactional volume; the marketing platform layer becomes free after the one-time license.

  • Marketing agency — 50 client lists

    Situation: Email service for 50 small-business clients, average 2,000 subscribers each, monthly newsletter + occasional promo.

    SendGrid cost: SendGrid: agency operates its own tenant layer over Subusers; reseller billing built externally. SendGrid subscription tier scaled to aggregate volume.

    AcelleMail cost: $199 Extended License once + $40/mo VPS + ~$30/mo SES total across all clients on one install. Built-in SaaS layer: per-client login, plans, dunning, 6 payment gateways.

  • Indie newsletter — 5,000 subscribers

    Situation: Weekly newsletter, no automation flows, no transactional traffic worth automating.

    SendGrid cost: SendGrid Marketing Campaigns Free tier ("6,000 emails per month and store up to 2,000 contacts") does not cover 5,000 contacts; a paid Marketing Campaigns tier is required.

    AcelleMail cost: $74 license + $5/mo VPS + ~$0.30/mo SES (3K weekly sends × $0.0001). Recovers ~24 months of equivalent paid SaaS subscription if previously paying for hosted email.

Frequently asked

Common questions

Can I migrate from SendGrid to AcelleMail without losing subscriber data?
Yes. SendGrid Marketing Campaigns exports contacts as CSV from the dashboard or via the Marketing Campaigns Contacts API at GET /marketing/contacts. AcelleMail's import accepts CSV with custom-field mapping and supports XLSX or direct DB seed for very large lists. Custom Fields and tags map to AcelleMail subscriber custom fields one-to-one. Plan a half-day for a list under 5,000 contacts; 2–3 days for lists with extensive automation logic to rebuild.
Can I keep using SendGrid as the sending engine after switching to AcelleMail?
Yes — SendGrid is one of 8 built-in sending drivers in AcelleMail (app/SendingServers/Drivers/Vendors/SendGrid/). Paste your existing SendGrid API key into Sending Servers → Add → SendGrid, and AcelleMail routes through the same SendGrid account you already use. This pattern is common: AcelleMail acts as the marketing platform and contact database; SendGrid keeps handling the actual SMTP delivery and deliverability monitoring.
How does AcelleMail's automation compare to SendGrid Marketing Campaigns Automations?
AcelleMail Automation2 ships a visual workflow builder with trigger / wait / condition / send / tag-update / segment-move nodes — multi-step journeys are configured in the UI without code. SendGrid Marketing Campaigns Automations are available on its paid Marketing Campaigns tiers and provide trigger-based automation for contact-event flows. Both approaches support multi-step journeys; the platform-fit difference is whether you want the marketing layer self-hosted (AcelleMail) or fully managed (SendGrid).
Why does AcelleMail charge $74 when SendGrid offers a Free tier?
AcelleMail Regular License ($74 one-time) is a commercial license that includes lifetime point + minor updates, 6 months of support, and full PHP source code with no per-email or per-contact recurring fees. SendGrid Marketing Campaigns Free tier covers "6,000 emails per month and store up to 2,000 contacts"; the Email API Free trial covers 100 emails/day for 60 days then a paid Email API tier is required. Above those Free thresholds, SendGrid bills monthly. The $74 covers a different bundle: visual automation, plugin SDK, 8 sending drivers, multi-language UI, multi-tenant SaaS layer ($199 Extended).
Can I run multiple client accounts under one AcelleMail install?
Yes — that's the AcelleMail Extended License ($199). It bundles a multi-tenant layer: customer accounts, subscription plans, 6 payment gateways (Stripe, PayPal, Braintree, Razorpay, Paystack, Offline), prorated upgrades, dunning, and white-label branding. SendGrid offers Subusers for per-subuser sending isolation; reseller billing of end customers is the integrator's build. See the For Agencies page for the architecture.
Does AcelleMail include the same deliverability tooling SendGrid offers?
Both platforms surface SPF/DKIM record generation. AcelleMail per-sending-server config exposes the records to publish; SendGrid Domain Authentication does the same for SendGrid-routed mail. The actual deliverability — IP reputation, blocklist monitoring, ISP relations — comes from the sending service. AcelleMail can route through SES, SendGrid, Mailgun, SparkPost, or any SMTP, so the deliverability layer is whichever provider you point it at. SendGrid Email API's managed reputation is a feature of SendGrid's sending service, not the marketing platform layer.
What stack does AcelleMail need vs SendGrid?
AcelleMail: PHP 8.1+, MySQL ≥ 5.7 or MariaDB ≥ 10.3, ~512 MB RAM minimum, 1 GB recommended for lists up to ~50K. Runs under PHP-FPM behind nginx or Apache. SendGrid is a Twilio-managed cloud service — no stack to host on the customer side. Customer-side surface area is the REST API or SMTP relay endpoint.
Does AcelleMail have a plugin SDK?
Yes. AcelleMail ships a four-pattern Hook system (REGISTRY, EVENT, FILTER, BEHAVIOR) — plugins live under storage/app/plugins/ and can register sending drivers, payment gateways, UI panels, and lifecycle hooks. See the Plugin SDK documentation for the four patterns and worked examples (Postal MTA, Paddle gateway, AI plugin). SendGrid extension is via the public REST API and Event Webhook; there is no in-process plugin runtime.
Which is the right choice for transactional-only API sends?
For transactional-only workloads (signup confirmations, password resets, billing notifications) where you don't need a marketing campaign UI, SendGrid Email API is purpose-built for that traffic and has a free trial. AcelleMail can also handle transactional sends through its SendingServer drivers, but its core value is the marketing platform layer. Many teams pair both: AcelleMail for marketing campaigns + SendGrid Email API for transactional, sharing the same sending domain.
Get started

Try AcelleMail before you migrate.

AcelleMail Regular License is $74, one-time. Includes lifetime updates, 6 months of support, full PHP source code, and unlimited subscribers. SendGrid stays usable as a sending driver if you want both. Try the live demo before you buy.

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SendGrid is the trademark of its respective owner. This page is an objective product comparison authored by AcelleMail; we are not affiliated with, endorsed by, or sponsored by SendGrid. All facts cited are sourced from publicly available documentation linked above; please report any inaccuracy to contact@acellemail.com and we will correct it.

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