After reconfiguring exim4 to correct for an unannounced change
courtesy of my ISP, I got outbound mail humming along once again
but also revived an old issue which several people may recognize:
2022-05-14 00:22:37 Warning: No server certificate defined; will use a
selfsigned one.
Suggested action: either install a certificate or change tls_advertise_hosts
option
This is a valuable warning but attempts to make exim
happy have not stopped the warnings which are the majority of
mainlog lines.
Except for exim4's contact with 1 smarthost, the rest of
the traffic through it is local traffic so any certificate should
turn off the bombardment.
I created
-rw-r----- 1 root Debian-exim 1245 May 8 21:43 /etc/exim4/exim.crt
with no change in behavior.
I then tried the second part of the suggestion which reads:
Suggested action: either install a certificate or change tls_advertise_hosts
option
I did. What I actually did was to edit
/etc/exim4/exim4.conf.template:tls_advertise_hosts = MAIN_TLS_ADVERTISE_HOSTS
so that it reads
tls_advertise_hosts =
Then I did dpkg-reconfigure exim4-config
That cert warning was the very first line of output meaning
nothing changed.
What is the least complex way to make these cert warnings
stop?
Martin McCormick
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