Hello,
I noted today unexpected spaces after 'msgid=' in the logs, dovecot-2.3.21.1 produce. First time a message from outlook was under inspection but I found also other sources.
there was one (unanswered) question in the list archive, that may be related: https://dovecot.org/mailman3/archives/list/dovecot@dovecot.org/thread/JU3S2I...
here are some samples:
lmtp(user@example)<22995><RtRIK/YvEWfTWQAAf9UaAw>: Info: save: box=INBOX/ietf/folder1/, uid=14143, msgid= <172917948321.1404061.2617721779338535905@dt-datatracker-78dc5ccf94-w8wgc>, size=7904 lmtp(user2@example.org)<23156><0cjVE809EWd0WgAAf9UaAw>: Info: save: box=INBOX/foo, uid=2632, msgid= <AM0PR06MB4100D06FAD74B7B33BFFDAA395472@AM0PR06MB4100.eurprd06.prod.outlook...., size=16755
But there are also "good" logs without the space for messages to other folders but same source (IETF in this case)
lmtp(user@example)<23143><bhcjK288EWdnWgAAf9UaAw>: Info: save: box=INBOX/ietf/folder2/, uid=567, msgid=<62424081-d68e-4334-b9a2-a62d0759cea3@gulbrandsen.priv.no>, size=11394
I've no older logs to check if that happened also before updating to 2.3.21.1
Andreas