APPEND command error: BAD ['invalid rfc5322 message: Sender should not be present if equal to From'] #733
Description
General informations
- system/distribution (with version): Ubuntu 22.04 LTS
- offlineimap version (
offlineimap -V): offlineimap v7.2.3, imaplib2 v2.57 (system), Python v2.7.18, OpenSSL 1.1.1f 31 Mar 2020 - Python version: Python v2.7.18 (from offlineimap -V output)
- CLI options: nil
- server: Proton Mail
Configuration file offlineimaprc
[general]
accounts = proton
pythonfile = /path/to/a/password/function.py
[Account proton]
localrepository = proton-local
remoterepository = proton-remote
autorefresh = 0.2
quick = 10
postsynchook = notmuch new
[Repository proton-local]
type = Maildir
localfolders = /path/to/maildir
sync_deletes = yes
[Repository proton-remote]
type = IMAP
remoteport = 1143
remotehost = 127.0.0.1
remoteuser = [email protected]
remotepasseval = get_pass()
keepalive = 60
holdconnectionopen = yes
expunge = yes
folderfilter = lambda foldername: foldername not in ['Labels.', 'Labels']
ssl = no
pythonfile (if any)
import sys
pwd = 'proton bridge password'
if len(sys.argv) == 1:
def get_pass():
return pwd
elif sys.argv[1] == 'mutt':
print('set imap_pass=' + pwd)
else:
print('error')
Logs, error
...
Folder Trash [acc: proton]: Copy message UID -1 (1/1) proton-local:Trash -> proton-remote:Trash ERROR: Saving msg (<ADDRESS>) folder 'Trash', repo 'proton-remote'failed (error). Server responded: APPEND command error: BAD ['invalid rfc5322 message: Sender should not be present if equal to From']. Data: PDBB24 APPEND Trash () "25-Aug-2023 19:04:11 +0100" {102363}
Message content was:
<prints select header info and most if not all of the content for the offending email>
...
Steps to reproduce the error
Run offlineimap (with no CLI options) after using mutt to move an email from INBOX to any other folder. In this case, to Trash.
From and Sender are indeed equal, more or less. In this case:
From: "Substack" [email protected]
Sender: Substack [email protected]
This error will also occasionally stop offlineimap from syncing. I think this has something to do with it printing the mail contents, but I haven't quite worked out what does this. It didn't happen in the current case.
If I manually delete the sender line from the email, then offlineimap returns to work normally.
I am assuming this is some issue with protonmail thinking that offlineimap is trying to give it a badly formatted email so perhaps the fault is with badly formatted emails. Just wondering if there's something I can do to stop this from happening without manually locating and deleting the sender line in these cases.