Dovecot SNI error message

Dovecot SNI error message

I got an email from Cron Daemon (root) containing:
/etc/cron.hourly/sympl-mail-dovecot-sni:
cat: /dev/shm/sympl-mail-dovecot-sni.data: No such file or directory

There are lots of entries in /var/log/mail.log like this:

Jun 24 17:13:20 host2 dovecot: imap-login: Disconnected (no auth attempts in 0 s
ecs): user=<>, rip=2a02:8010:6315:0:d89a:bd3:203c:705b, lip=2001:ba8:1f1:f0a1::2
, TLS handshaking: SSL_accept() failed: error:14094416:SSL routines:ssl3_read_by
tes:sslv3 alert certificate unknown: SSL alert number 46, session=<kMc/TYXFpvIqA
oAQYxUAANiaC9MgPHBb>
Jun 24 17:13:21 host2 dovecot: imap-login: Disconnected (no auth attempts in 0 s
ecs): user=<>, rip=2a02:8010:6315:0:d89a:bd3:203c:705b, lip=2001:ba8:1f1:f0a1::2
, TLS handshaking: SSL_accept() failed: error:14094416:SSL routines:ssl3_read_by
tes:sslv3 alert certificate unknown: SSL alert number 46, session=<HO1GTYXFp/IqA
oAQYxUAANiaC9MgPHBb>

Thunderbird was stuck trying to retrieve mail (I think the above log entries were from that)

mutt complained about an unrecognised certificate, and I told it to accept it; it worked after that.

My Android tablet and phone with K9 mail weren’t bothered at all.

(Edit: My wife said there were errors on her iPad when connecting to mail, but I haven’t seen an example yet.)

Environment

  • Sympl Version 10.0
  • Sympl Testing Version? No
  • Debian Version Stretch
  • Hardware Type? Virtual
  • Hosted On? BitFolk

The only other change I’ve made on the server this afternoon was to add a subdomain to a web site, including an SSL certificate for the subdomain, a procedure that usually causes no trouble.