I have a rather peculiar problem. I've been using a user cronjob calling
fetchmail to receive mail from 6 IMAP accounts for about two months. It is set up to forward mail to
procmail, which then sorts it into a number of mailboxes, then I used to read it with mutt.
This worked fine until Marh 8th, when suddenly fetchmail would still retrieve mail, but mail from 5 out of the 6 accounts would simply disappear. It would neither appear in
/var/spool/mail/my-username nor in the procmail logfile, though the fetchmail logfile reports it's happily retrieving messages.
I can telnet to
localhost:25, am not running from root and have not consciously set up any alias or forward options and did not make any system updates around the date. My system is Fedora 27. The working account is the last one in the
.fetchmailrc, if that's of interest.