Am 26.07.2022 um 14:28 schrieb Wietse Venema:
Wietse Venema:
Helmut Schneider:
> Error: too many connections from 172.20.16.26
LOOK IN YOUR LOGS.
That will tell you if this is a concurrency or rate limti problem.
However, the problem is that your exclusion configuration is broken.
You specify a CIDR table, but you failed to tell Postfix
that the table is in CIDR format.
smtpd_client_event_limit_exceptions = cidr:/path/to/file
$ postmulti -i postfix-in -x postconf
smtpd_client_connection_limit_exceptions
smtpd_client_connection_limit_exceptions =
cidr:/etc/postfix-in/smtpd_client_connection_limit_exceptions
$ postmulti -i postfix-in -x postconf smtpd_client_event_limit_exceptions
smtpd_client_event_limit_exceptions =
cidr:/etc/postfix-in/smtpd_client_event_limit_exceptions
$
<Relaoded postfix>
<Flushed queue>
Jul 26 16:30:52 mail02 postfix-out/error[1388996]: 51DF9B70D8E1:
to=<blabla>, relay=none, delay=32196, delays=32196/0.61/0/0.01,
dsn=4.7.0, status=deferred (delivery temporarily suspended: host
mailin[172.20.16.27] refused to talk to me: 421 4.7.0 mail02 Error: too
many connections from 172.20.16.26)
172.20.16.26 and 172.20.16.27 are both on the same host so I'm sure I
fixed the CIDR notation in all config files (thanks for the hint).
