- Set the \Deleted IMAP system flag.
- Expunge (which is called "purge" or "compact" in some email clients).
SeaMonkey Suite and Thunderbird are examples of email clients that were not originally designed as IMAP clients and have not (yet) converted to the IMAP way of deleting a message. The default in these email clients is to "move it to the Trash folder." To switch to the IMAP way of deletion in SeaMonkey Suite on OS X, go to the Mail & Newsgroups window and from the Edit menu, choose Mail & Newsgroups Account Settings > Server Settings. One of the configuration settings in this window is this:
- When I delete a message:
- Move it to the Trash folder
- Mark it as deleted
- Remove it immediately
In Horde/IMP, you can use the IMAP way of deleting a message by going to Options > Mail > Deleting and Moving Messages, and make sure that the following two options are not checked:
[ ] When deleting messages, move them to your Trash folder instead of marking them as deleted?Many IMAP clients make it easy for a user to view a virtual mailbox [**] of either of the following:
[ ] Use Virtual Trash Folder?
- all messages in a mailbox with the \Deleted flag not set
- all messages in a mailbox with the \Deleted flag set
Most IMAP clients can be set up to automatically expunge messages when you close a mailbox and I recommend that you set up at least one of your IMAP clients to do this. I use Pine as my automatic expunger because I can set it up to prompt me whenever it is about to do an auto expunge. Here are the Pine configuration settings (which are the Pine default settings) that do this:
[ ] expunge-only-manuallyMulberry can also be set up so that it will prompt you when it is about to do an auto expunge. The relevant Mulberry Mailbox Preferences are:
[ ] expunge-without-confirm
[ ] expunge-without-confirm-everywhere
[X] Expunge on CloseAs far as I can tell, SeaMonkey Suite and Thunderbird can not be set up to warn on expunge, but please post a comment about this if you know the story.
[X] Warn on Expunge
Tip: If you are paranoid about accidentally expunging an important message, I recommend that you use a backup-all mailbox. This way you will have a backup copy of every message you have ever received.
[*] With any setting other than "Mark it as deleted," the Mozilla-based email clients will completely hide any message in a mailbox that has the \Deleted flag set. For a discussion about how confusing this is to IMAP users, see this and this bug in Bugzilla.mozilla.org.
[**] A virtual mailbox or saved search is a set of messages that match a set of conditions. The messages might be a subset of a single actual mailbox or might come from multiple actual mailboxes. To learn more about this, see Sometimes a Mailbox is Just Not a Mailbox.
Hashtag: #imap-way-of- [?]
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