1) Use GnuPG 2) Compose e-mail 3) Watch Claws-Mail save your e-mail IN PLAINTEXT to the server you have configured 4) Get your e-mail read by your e-mail provider I am unable to find anywhere I can disable Claws-Mail from saving the e-mails being composed to the "Drafts" folder. This is a major security problem and makes Claws-Mail completely insecure when used with GnuPG. Preferred behaviour would be to NEVER save your e-mails to "Drafts" when a GnuPG key is configured for an account. An alternative solution could be to save it as a message encrypted to yourself when saving to Drafts but I think the best thing to do would be to not save messages to Drafts. This could be a configuration option which is enabled by default if a GnuPG key is set. There should probably be a configuration option to prevent it from saving anything to "Drafts" every even for non-GnuPG users. GnuPG+Claws-Mail is to be considered unsecure and compromized with the current way it works.
After looking more I found Preferences -> Compose -> Writing to disble "Save to drafts"
*** This bug has been marked as a duplicate of bug 2965 ***
(In reply to comment #0) > GnuPG+Claws-Mail is to be considered unsecure and compromized with the > current way it works. That's nonsense, an overstatement at best. You can use a Local queue and drafts folder in an MH mailbox, and besides, IMAP accounts are not the only kind of accounts.