Prime9AI Campaign Sender is a self-hosted campaign sender. It solves one specific problem: sending a large list all at once is the fastest way to hit your mail provider's rate limits and get your domain blacklisted.<\/p>\n\n
Instead, the plugin paces delivery. You choose a batch size and an interval, and a WP-Cron job releases small groups of messages over minutes, hours or days, staying under the limits your provider enforces.<\/p>\n\n
Nothing is routed through a third-party sending service. Your list stays in your database, and your mail goes out over your own SMTP credentials.<\/p>\n\n
Everything in this plugin is free and fully functional, with no limits on subscribers or campaigns.<\/p>\n\n
A separate Pro plugin, sold at https:\/\/prime9ai.com\/prime9ai-campaign-sender\/, adds recurring send windows, a campaign analytics screen and integration with other SMTP plugins. The Pro Features screen shows what it adds, and panels on the relevant screens can be hidden. None of that code is included here.<\/p>\n\n
This plugin gives you controls; the sending policy is yours. Warm up new sending domains, respect per-domain limits, honour unsubscribes promptly, and only mail people who asked to hear from you.<\/p>\n\n
This plugin does not connect to any service run by its author.<\/p>\n\n
Your SMTP server<\/strong><\/p>\n\n Campaign content, subject lines and recipient addresses are transmitted to whichever SMTP server you configure in the plugin's settings. That server is chosen and controlled by you; the plugin has no default and contacts no mail server until you supply credentials. Review your mail provider's own terms and privacy policy.<\/p>\n\n Prime9AI Campaign Sender stores subscriber email addresses, unsubscribe records, and open\/click events in your site's database. It does not send this data anywhere.<\/p>\n\n Open and click tracking records the recipient's email address, the campaign, and the clicked URL. Tracking can be disabled entirely under Campaign Sender \u2192 Settings<\/strong>. A configurable data retention setting (90 days by default) deletes old analytics, bounce records, failed emails and debug logs automatically once a day. Emails still waiting to be sent and suppression entries are kept, so an unsubscribe is never forgotten.<\/p>\n\n\n No. Campaigns go out over the SMTP server you configure. Prime9AI Campaign Sender never routes your messages or your list through anyone else's infrastructure.<\/p><\/dd>\n Yes. The sending queue is driven by WP-Cron. If you have set There is no limit in the plugin. The practical ceiling is your mail provider's sending limits and your server's ability to run the cron job. Lists larger than 10,000 addresses are automatically split into batches, and you can change that threshold in Settings.<\/p><\/dd>\n Set a conservative batch size and a generous interval, keep the per-domain cap low, publish SPF, DKIM and DMARC records for your sending domain, and never import a list the recipients did not opt in to. New domains should start at a very low volume and increase over days.<\/p><\/dd>\n As CSV files under The address is added to the suppression list, and any messages still queued for that address are deleted immediately, so they will not receive the rest of the campaign. Future imports skip suppressed addresses automatically.<\/p><\/dd>\n Yes. All user-facing strings use the Nothing is lost. When the daily limit is reached, sending stops until midnight in your site's timezone. When a domain reaches its hourly limit, emails to that domain wait for the next hour while other domains carry on. Set either limit to 0 to turn it off.<\/p><\/dd>\n A recipient the mail server refuses with a permanent (5xx) error while the email is being sent. Bounces reported later by email are not read. Sender problems, such as a wrong SMTP password, are never counted as bounces.<\/p><\/dd>\n SMTP plugins change how WordPress sends its own mail. This plugin is a campaign sender: it holds your lists, builds campaigns, and releases them gradually through a queue so a large send does not hit your provider's rate limits or damage your domain's reputation.<\/p><\/dd>\n\n<\/dl>\n\n\nPrivacy<\/h3>\n\n
\n
\n
Does this send email through a third-party service?<\/h3><\/dt>\n
Does WP-Cron need to be enabled?<\/h3><\/dt>\n
DISABLE_WP_CRON<\/code> to true, configure a real system cron that hits wp-cron.php<\/code> at least once a minute, otherwise campaigns will stall. Sites with little traffic should use a system cron regardless, because WP-Cron only fires when someone visits the site.<\/p><\/dd>\nHow many subscribers and campaigns can I have?<\/h3><\/dt>\n
How do I avoid being marked as spam?<\/h3><\/dt>\n
Where are my uploaded lists stored?<\/h3><\/dt>\n
wp-content\/uploads\/prime9ai-campaign-sender\/lists\/<\/code>, with unguessable filenames and server-level deny rules where the server supports them. They are never exposed through a public URL.<\/p><\/dd>\nWhat happens when someone unsubscribes?<\/h3><\/dt>\n
Is the plugin translation-ready?<\/h3><\/dt>\n
prime9ai-campaign-sender<\/code> text domain, and a POT file ships in languages\/<\/code> for translators.<\/p><\/dd>\nWhat happens when a sending limit is reached?<\/h3><\/dt>\n
What counts as a bounce?<\/h3><\/dt>\n
How is this different from an SMTP plugin?<\/h3><\/dt>\n
2.0.0<\/h4>\n\n
\n