Remove previous recipients

I would also like to see a method to clear out previous addresses.
Mail.app allows you to do this from a drop down menu when clicking on the address in the to: text box.

Would also greatly appreciate a feature to remove prior recipients, thanks.

+1, please! We need a blacklist for defunct addresses.

I'm aware that I need to come up with a solution for this problem. My main problem has been that I have not been satisfied with the ideas I've had for implementing it. I would prefer it could have been handled by an IMAP keyword which could be applied to previously sent emails to “blacklisted” recipients, but I've now (finally) decided that this won't work well (for several reasons). I'll opt for an explicit file for maintaining blacklisted addresses and then I'll worry about synchronizing this between MailMate installs later on (together with other synchronization issues). This should also be much simpler to implement.

Hopefully this decision will make an implementation more likely :)

The latest test release has a very quick implementation of a blacklisting feature (see menu item in the menu shown in the message headers view or in the recipient text fields in the composer when right-clicking addresses). Hold down ⌥ when clicking “Check Now” to try this out (r5351).

Thanks for this.

Took a while to figure out where to find the menu (clicking on an address in the composer view works for me). Have tried it out and works well, but I have another question/suggestion: is it possible to view the "blacklisted" addresses in the hypothetical event that I would need to "unblacklist" an address? Perhaps a more logical way of handling it would be something similar to how apple mail does it, i.e. deleting the addresses in the address viewer rather than creating a blacklist?

The blacklisted addresses are saved here:

~/Library/Application Support/MailMate/Blacklist.plist

This file can be edited when MailMate is not running. Maybe I'll add a GUI some day.

I know the Apple way may seem more natural, but MailMate does not keep an explicit list of previous recipients. It simply looks at your “Sent Messages” mailbox. In theory, “Sent Messages” is the list of previous recipients. (Alternatively, one can disable that MailMate looks in “Sent Messages” and then only rely on what's found in Contacts.)

Thanks for the clarification. Editing the plist is sufficient for me. I just wanted to be sure that I could relatively easily remove any address from the blacklist in the future if needed. Perhaps my situation is not the most common, but I have contacts that have moved back and forth between institutions (with very similar names) and I need to be able to make sure I send my emails to where they are now. The new blacklist is thus a very welcome addition. Thanks!

Another issue I just discovered is that the blacklist seems to be case-sensitive. Perhaps that could be fixed? The issue arises if, for example, a contact has setup their address with capital letters in the name whereas I have saved it in the address book in lower-case. Thinking about it, it might be a nice feature to ignore capital letters across the address suggestions to avoid duplicates even if they're not on the blacklist...

@Christian: I've noted the case-sensitivity issue.

The blacklist appears no longer to exist, or else I have a corrupted install.

Assuming the former, could you please point me to the current location?

Thanks!
Wes

@Wes: Its location has not changed. It's still:

~/Library/Application Support/MailMate/Blacklist.plist

Note: Just in case its relevant, the /Users/<username>/Library folder is hidden by macOS by default.