If you wanna send a sequence of messages to your subscribers, say, a series of follow-ups or a tutorial series or whatever, then it might interest you to know that not all WordPress newsletter plugin support this feature. Some plugins are just for broadcasting individual messages. They are not for automated and scheduled sending of emails. So, find below the plugin that meets your autoresponder sending requirements.
You can click on the name of the product below to view its full review.
Tribulant Newsletter
Like most other things Tribulant Newsletter does, it nails autoresponder functionality! You can assign autoresponders to specific mailing lists and each autoresponder message has its own delay settings. You can turn a previously saved newsletter into an autoresponder message or you can create one on the spot.
WP Autoresponder
The plugin name is WP Autoresponders, so yes, of course it does autoresponders. You can create an unlimited number of autoresponders. Each mailing list can have any number of autoresponders. Subscribers to that mailing list will receive the autoresponder. And an autoresponder can have any number of messages. While you're composing the message, you can specify the number of days after which the message will be sent.
Satollo's Newsletter
While Satollo's Newsletter has the ability to send an autoresponder sequence, the way this is implemented is hardcoded and very restrictive. You can only have one autoresponder. And that single autoresponder can only have a maximum of 9 messages And you cannot schedule messages individually. All you can do is specify a single "Interval between steps" in hours. If you set that to 48, for example, the system will send one message from your autoresponder every 48 hours. That's it.
MailPress
Autoresponders are possible in MailPress also through one of the add-ons.
After enabling the add-on, you go to the autoresponder screen and add a new autoresponder. You can tie each autoresponder to a specific event that will trigger it. Those events can be: activation of subscription, joining a certain mailing list, or unsubscribing. Then, you go to the "Add New Mail" screen to create the actual mail that'll go out and you can add it to whatever autoresponder and schedule it for the future.
I find this to be a bit convoluted and unintuitive and judging by the reports online, it seems a bit buggy and problematic.
[GWA] Autoresponder Professional
Scheduling autoresponders with [GWA] Autoresponder is simple. You create messages, assign those messages to specific mailing lists, and give each message a number of days as the delay.
![Screenshot: [GWA] Autoresponder "Add Message"](http://winkpress.wpengine.netdna-cdn.com/wp-content/uploads/2011/08/gwa-autoresponder/gwa-autoresponder-add-message.png){kind=link}