On 2021-04-28 11:28, Asai wrote:
We are getting reports, more and more, of email clients (Type App, Mac
Mail, iOS Mail) that seem to send email, and show that the email has
been sent on the client, but the mail server has no record of email
ever reaching the SMTP service, nor does it even seem that the client
is connecting to the server.
Can someone advise as to what area of debugging we can turn on?
You can't. If the non-verbose logs don't show the connection coming to
you, the verbose logs won't have it either, and they will just obscure
the relevant bits in a whole lot of noise.
There's a lot of info in debugging, and we can't turn it all on at
once, so we could use some specifics.
Thanks for your insights here.
No logs mean you should double-check your DNS and firewall, as well as
your syslogd and/or other logging mechanism. For syslog daemons,
logger(1) is your friend.
--
http://rob0.nodns4.us/
