The message contains one or more attachments that are too large to be saved in the Drafts mailbox. Try deleting some attachments.
This seems to be a problem with signing mails. If I turn off signing mails with PGP the problem disappears. It occurs since the last update to mac os 13.2.
MacBook Air (M2)
This is a known issue with GPGMail. They have a pre-release nightly that fixes the issue, and it will eventually be added to a release per this thread: https://gpgtools.tenderapp.com/discussions/feedback/17663-macos-132-mail-app-can-no-longer-send-email-or-save-drafts
I downloaded the most recent nightly build here, and it fixed it for me: https://releases.gpgtools.org/nightlies/
This is a known issue with GPGMail. They have a pre-release nightly that fixes the issue, and it will eventually be added to a release per this thread: https://gpgtools.tenderapp.com/discussions/feedback/17663-macos-132-mail-app-can-no-longer-send-email-or-save-drafts
I downloaded the most recent nightly build here, and it fixed it for me: https://releases.gpgtools.org/nightlies/
Problem sending mail with PGP signature. Complaining about too large attachments.
