Queue, Throttle, Send SMTP email through multiple providers. Automatic re-send when non-delivery received.
As of April 2026, Mail Queues by PBCI is a WordPress uce plugin with 30 active installations and a 4.7/5 rating from 3 reviews. It has been downloaded 6.7K+ times in total. Requires WordPress 3.0+ and PHP false+. Available on WordPress.org since 2012. Last updated 12 years ago — may have compatibility concerns.
Send mail using SMTP without exceeding the the rate allowed by your mail provider(s). Mail can be sent using multiple
user logins/passwords to give fault tolerance and make each mail message somewhat unique so that it is less likely to
be flagged as SPAM/UCE by either your or the downstream mail providers. Messages can be automatically resent when
the plugin detects Non-delivery messages (NDRs) returned from mail sent by the plugin.
Email can be throttled per outbound SMTP account. Limits can be set for maximum number of recipients per hour and per day.
| WordPress | 3.0+ requiredTested up to 3.5.2 |
| PHP | false+ required |
General bug fixes
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