Active installations900Adoption metric — not a quality score
WordPress.org rating5.0 / 5 from 1 ratings
Official packageDirect from WordPress.org
Repository metrics are context, not quality scores. Active installations measure adoption and can strongly reflect a plugin’s age and historical popularity. Ratings, recent updates and “Tested up to” metadata also do not guarantee modern code, error-free operation, security, feature completeness or suitability for a particular site. Why active installs don’t tell the whole story →
WP PlugIndex currently records Mailster SendGrid Integration version 2.1.1 as active, updated 18d ago and tested up to WordPress 7.1.
Overview
About this plugin
Mailster SendGrid Integration connects SendGrid to the Mailster Newsletter Plugin for WordPress so you can send campaigns through SendGrid instead of your web host’s mail server.
Use it when SendGrid is your email delivery provider and you want to keep Mailster’s campaign editor, lists, and subscriber management.
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0 or newer and a SendGrid account with an API key. com.
Why send Mailster newsletters with SendGrid?
SendGrid delivery for Mailster — Registers SendGrid as a delivery method under Newsletter → Settings → Delivery.
Web API or SMTP — Send with the SendGrid Mail Send API v3 (recommended), or relay through smtp.sendgrid.net using the username apikey. Secure SMTP uses port 465; otherwise the plugin uses port 587.
API key check — Verifies the key against the SendGrid scopes endpoint and shows whether it is accepted.
Categories — On the Web API, attach up to 10 SendGrid categories so you can group sends in SendGrid.
Reply-to, attachments, and inline images — The Web API sends reply-to, file attachments, and inline images with the message.
Campaign metadata — The Web API includes Mailster campaign, subscriber, and message IDs as SendGrid custom arguments, and forwards Mailster headers.
Bounce and suppression sync — Reads SendGrid bounces, blocks, spam reports, and unsubscribes and applies them in Mailster.
How it works
Install and activate Mailster SendGrid Integration alongside Mailster 4.0+.
Create a SendGrid API key with Mail Send access and Suppressions read access, and authenticate the sender or domain in SendGrid.
Open Newsletter → Settings → Delivery, select the SendGrid tab, paste the API key, and save.
Choose WEB API or SMTP API. For SMTP, turn on the secure connection if you need port 465.
Send a test email from a verified From address, then run your Mailster campaigns through SendGrid.
Setup walkthrough: Send your newsletters via SendGrid.
WordPress.org metadata
Plugin tags
Topics listed for this plugin in the WordPress.org directory.
email
mailster
mailsteresp
newsletter
sendgrid
Compatibility & maintenance
Compatibility & maintenance
Tested with WP 7.1
Marked as tested with the current WordPress 7.1 release.
Current WordPress releaseWordPress 7.1
WordPress.org Tested up to7.1
Minimum requirementsWordPress 6.0 · PHP not listed
Update activity15 Oct 202618d ago
“Tested up to” is directory metadata supplied by the plugin author. WP PlugIndex does not turn an older declaration into a claim that the plugin is incompatible.
Changes recorded by WP PlugIndex
Recent tracked changes
WordPress compatibility6.5.10→7.1.3
Tracking & source
WP PlugIndex tracks public WordPress.org directory metadata and records selected version, compatibility and availability changes as they are detected.
