Postfix / DNS issue, PLEASE HEP!
Guys,
I'm stuffed.
I had Postfix running on the server for months. But all over sudden it stopped sending emails to extarnal domains. I must fix it, but I run out of ideas. PLEASE, HELP!
Here is my sad story.
Emails are Ok on the way from client app to my server. They are actually being stuck in the queue as deffered.
So, I have checked logs:
Code:
Aug 6 22:01:50 www postfix/smtp[3592]: 4F0272264CF3: to=<uzla2010@googlemail.com>,
relay=none, delay=386320, delays=386264/0.06/56/0, dsn=4.4.3, status=deferred
(Host or domain name not found. Name service error for name=googlemail.com type=MX: Host not found, try again)
"Host not found, try again" looks like it is a DNS issue.
O'Reilly postfix definitive guide says: "The DNS query produced no answer. Either the DNS server is not reachable, or it is broken." It seems to be reasonable.
So I have checked /etc/resolv.conf :
Code:
www:/etc# cat /etc/resolv.conf
domain croup.de
nameserver 208.84.145.233
nameserver 208.84.145.155
nameserver 208.77.96.36
Then I checked whether rimary DNS server is working:
www:/etc# man nslookup
Reformatting nslookup(1), please wait...
www:/etc# nslookup
> server 208.84.145.233
Default server: 208.84.145.233
Address: 208.84.145.233#53
> set q=mx
> googlemail.com
Server: 208.84.145.233
Address: 208.84.145.233#53
Non-authoritative answer:
googlemail.com mail exchanger = 10 alt2.gmail-smtp-in.l.google.com.
googlemail.com mail exchanger = 50 gsmtp147.google.com.
googlemail.com mail exchanger = 50 gsmtp183.google.com.
googlemail.com mail exchanger = 5 gmail-smtp-in.l.google.com.
googlemail.com mail exchanger = 10 alt1.gmail-smtp-in.l.google.com.
Authoritative answers can be found from:
>
and also
Code:
www:/etc# dig mx googlemail.com
; <<>> DiG 9.3.4 <<>> mx googlemail.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39960
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;googlemail.com. IN MX
;; ANSWER SECTION:
googlemail.com. 598 IN MX 50 gsmtp183.google.com.
googlemail.com. 598 IN MX 5 gmail-smtp-in.l.google.com.
googlemail.com. 598 IN MX 10 alt1.gmail-smtp-in.l.google.com.
googlemail.com. 598 IN MX 10 alt2.gmail-smtp-in.l.google.com.
googlemail.com. 598 IN MX 50 gsmtp147.google.com.
;; Query time: 1 msec
;; SERVER: 208.84.145.233#53(208.84.145.233)
;; WHEN: Wed Aug 6 22:08:01 2008
;; MSG SIZE rcvd: 163
www:/etc#
SO, it seems that my server's DNS is working fine! (or not?)
I even restarted postfix just in case.
Now what do I have as a result:
- postfix is up and running;
- postfix accepting emails;
- ostfix sends email to localdomains;
- DNS seems to be working fine;
- and IT DOES NOT SEND EMAILS TO EXTERANL DOMAINS!
I'm really, really confused.
Here is my config:
Code:
www:/home/uzla32# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
content_filter = amavis:[127.0.0.1]:10024
inet_interfaces = all
mailbox_size_limit = 0
mydestination = www.myexamplesitename.com, localhost, localhost.localdomain
myhostname = www.myexamplesitename.com
mynetworks = 127.0.0.0/8
myorigin = /etc/mailname
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 $virtual_mailbox_limit_maps
receive_override_options = no_address_mappings
recipient_delimiter = +
relayhost =
smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtpd_use_tls = yes
transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /home/vmail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_uid_maps = static:5000
Please, help!
Many thanks in advance!
