Milan Dinić

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Don’t want to publish all of your posts at once but hate manual scheduling/rescheduling? Post to Queue comes as a solution. You just put posts to queue and they’ll be published automatically when chosen time passes since last published post of that post type. It’s even possible to choose days of the week and hours of the day when those posts will be published.
Post to Queue is like Buffer for WordPress, just better.
It requires that cron runs regularly to be able to publish posts on time.
Post to Queue code is partly based on a code from plugin <a href="https://wordpress.org/plugins/automatic-post-scheduler/" rel="ugc">Automatic Post Scheduler</a> by <a href="http://tudorsandu.ro/" rel="nofollow ugc">Tudor Sandu</a> and a code from plugin <a href="https://wordpress.org/plugins/metronet-reorder-posts/" rel="ugc">Metronet Reorder Posts</a> by <a href="http://www.ronalfy.com/" rel="nofollow ugc">Ronald Huereca</a> and <a href="https://geek.hellyer.kiwi/" rel="nofollow ugc">Ryan Hellyer</a> for <a href="http://www.metronet.no/" rel="nofollow ugc">Metronet Norge AS</a>.
And it’s on <a href="https://github.com/dimadin/post-to-queue" rel="nofollow ugc">GitHub</a>.

Post to Queue

Stack posts to queue and auto publish them in chosen interval and time frame.

This plugin enhances the security and stability of your WordPress installation by delaying and controlling wp_mail() email submissions through a managed queue.
If your site exhibits unusual behavior — such as a spam bot repeatedly submitting forms — you will be alerted immediately.
<ul>
<li>Intercepts wp_mail() and places outgoing messages in a queue</li>
<li>Configure how many emails are sent and at what interval</li>
<li>Log all queued email submissions</li>
<li>Receive alerts when the queue grows unexpectedly</li>
<li>Receive alerts when WordPress is unable to send emails</li>
</ul>

Mail Queue

Take control of emails sent by WordPress. Queue outgoing emails and get notified instantly if your website is trying to send too many emails at once!

Post to Queue vs Mail Queue