Many thanks foryour response, Kevin! I appreciate your help a lot, even if it seems that, in the end, the track I am on is a dead end.
Thanks again!! Sébastien. Kevin J. McCarthy (2023/04/13 08:51 -0700): > On Thu, Apr 13, 2023 at 01:59:56PM +0200, Sébastien Hinderer wrote: > > Am I correct in trusting the sysadmin that IMAP support is indeed enabled > > for this account? > > IMAP does appear to be enabled, since Mutt is able to connect to the IMAP > port and try to authenticate. > > > If the problem would be an incorrect password, would that be written > > explicitly in the debug output, or would I get this error message and no > > more details? > > No, Mutt has no way to tell if the password is correct or not. Mutt knows > as much as you see in the debug output: the server replied with "NO > AUTHENTICATE failed.", without giving an explicit reason. > > Note you can check the authentication value sent in the debug log by base64 > decoding it. For PLAIN it should be $imap_user + '\0' + $imap_login + '\0' > + $imap_pass. (The default of value of $imap_login is $imap_user - so there > is no need to set it separately unless there is a need for them to be > different). > > It could be that PLAIN is advertised, but not actually working. That would > be something to ask the admin about too. >