Gather subscribers, manage them in separate newsletters, send follow-up emails, send broadcasts, send blog post deliveries all in one plugin.
Once I got an external crons triggering wp-cron.php, this thing rocked. I gave it only 4 stars because I'm not sure if it handles bounced emails.
If you use a scheduled crons, make sure you add this line of code to your wp-config.php file:
You can then use your hosting crons job to trigger wp-cron.php like such:
wget -q -O - http://yourwebsite.com/wp-cron.php?doing_wp_cron >/dev/null 2>&1
Run it every five minutes and you should be good to go.
Plugin offers double opt-in only. However, with some small modifications, you can add single opt-in support. I wrote about it here: How to add single opt-in to WP Autoresponder
Not recommendable for a sequence of autoresponders: I cannot recommend the plugin. I put quite some time in it to make everything run. I have only one use case: Send out a sequence of autoresponders. However, it is completely unclear when these emails get send out. If you set a sequence of 0, they'll send more or less immediately (with the next wpcron-event). If you set a sequence of 1, well, I don't know. Something like "after 24 hours + X" or so. It is NOT "on the next day". It was too much of a hassle to understand at what time the next autoresponder is sent, so I uninstalled the plugin.
Troubleshooting I figured so far:
For sending out mails: Make sure to setup the SMTP server correctly and note that new subscribers get wp-cron scheduled. Use cron view or something similar to check out whether your cron tasks are scheduled or not.
Two more possibilities for errors via SMTP:
Does your server use encryption? Can you connect to the SMTP server without a certificate warning?
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