Send Mass Emails
So far the only way you could send mails to several people in custom modules at one shot was to select multiple records in the list view and use the Send Mail option.

Now you can use the Mass Email option from Module Tools, filter out records by specifying appropriate criteria and send a mass email to these contacts.

Schedule Mass Emails
You can also schedule mass emails for contacts in the custom modules.

Set Auto responders
Auto responders are a marketing automation function that can streamline the process of sending series of personalized email messages at predefined intervals to your contacts. Now set auto responders for contacts in the custom modules as well.

We are positive that you will find these options in the custom modules useful. Let us know if you have any questions.

Regards
Vaagdevi Ravishankar