Hello
I'm testing mail server with mysql backend. Generally it works quite well. But from time to time during testing, single mails can't be send because of smtp errors:
in mail.log
Feb 3 13:47:37 mail postfix/smtpd[28339]: NOQUEUE: reject: RCPT from unknown[ip]: 451 4.3.0 <user@domain.org>: Temporary lookup failure; from=<user@domain.org> to=<user@domain2.org> proto=ESMTP helo=<domain.org >
in mail.warn
Feb 3 13:47:37 kurier4 postfix/trivial-rewrite[2438]: warning: transport_maps lookup failure
when I check transport_map:
postconf | grep transport_map
address_verify_transport_maps = $transport_maps
fallback_transport_maps =
mailbox_transport_maps =
mydestination = $myhostname, localhost.localdomain, $transport_maps
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks
transport_maps = mysql:/etc/mail/sql/mysql-transport.cf
my /etc/mail/sql/mysql-transport.cf looks like that:
user = postfix
password = password
dbname = maildb
table = transport
select_field = destination
where_field = domain
hosts = 127.0.0.1
Generally I'm thinking that it could be mysql error - but there is nothing wrong in its error log...
I set really big limit of concurrent connections
max_user_connections = 1000
So what can be wrong?
Any ideas?
Thank in progress for any help
best regards
nichu