Today my boss asked me whether it is possible to automatically delete email messages in the server inside certain folders after a given number of days. For example he wants the sent emails inside the ‘Sent’ folder is automatically deleted after 2 days. And also in the ‘Trash’ folder as well.
The answer is yes. It is possible to do it and easy. If you are using Courier-IMAP (a server that provides IMAP access to Maildirs), by default the email messages inside ‘Trash’ folder will be deleted after 7 days. It is set by the
option in the /path/to/courier-imap/etc/imapd file. In Centos, the file is /usr/lib/courier-imap/etc/imapd.
IMAP_EMPTYTRASH is a comma-separated list of folder:days.
So if we want to automatically delete email messages inside the ‘Trash’ and ‘Sent’ folder after 2 days old, set the IMAP_EMPTYTRASH value as follow:
Of course you can do the same thing to other folders. Folder Drafts for example set to delete the messages after 7 days. The value becomes as follow:
Restart the Courier-IMAP service to re-read the changes.