Recebi um e-mail de alerta sobre o comprimento do Mailqueue no Nagios:
Additional Info: WARN - Mailqueue length is 18 (More than threshold: 10)
No mailq
, vejo algumas mensagens como esta:
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
A7B39BFB01A7 16746 Tue Apr 9 08:54:57 [email protected]
(connect to asdasd.vn[203.119.8.111]: Connection timed out)
[email protected]
O valor de smtpd_recipient_restrictions
:
smtpd_recipient_restrictions =
permit_sasl_authenticated,
permit_mynetworks,
reject_unauth_destination,
check_policy_service unix:private/policy,
reject_unknown_recipient_domain,
reject_unverified_recipient
Observe que eu habilitei o reject_unknown_recipient_domain
.
Mas vamos ver para qual endereço IP esse domínio está mapeado:
$ nslookup asdasd.vn
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
asdasd.vn canonical name = thongbao.vnnic.vn.
Name: thongbao.vnnic.vn
Address: 203.119.8.111
Existe alguma maneira de desativar esse comportamento além da lista negra 203.119.8.111?
UPDATE 1
/var/log/maillog
:
Apr 9 15:50:36 mail postfix/qmgr[18585]: 23A66BFB01A0: to=<[email protected]>, relay=none, delay=25004, delays=24983/21/
0/0, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to asdasd.vn[203.119.8.111]: Connection timed out)