postfix suddenly failed to expand mail aliases

Question

I have used postfix on vine-linux legacy machine names "vine.domain.com (@ 210.251.xx.xx/28)" and have set mailalias on /etc/aliases:

mike: [email protected]

for a long time. I have put $mydestination entry on /etc/postfix/main.cf

mydestination = $myhostname, localhost.$mydomain $mydomain, somedomain.to

So usually postfix on vine.domain.com receives emails to "[email protected]" and passes through to "[email protected]".

After we have just incremented serial of DNS record @somedomain.to, suddenly vine.domain.com fails email transfer from vine.domain.com to MX.gmail.com. Here /var/log/maillog says:

Jul 19 17:53:29 vine postfix/smtp[14423]: 457C3C5FED: to=, relay=none, delay=0, status=bounced (Name service error for gmail.com: Host found but no data record of requested type)

When we works well, the maillog was like this:

Jul 14 16:14:32 vine postfix/local[27176]: 7C759C6408: to=, relay=local, delay=0, status=sent(forwarded as B4070C6410)

Jul 14 16:14:34 vine postfix/smtp[27198]: B4070C6410: to=, relay=gmail-smtp-in.l.google.com[74.125.68.27], delay=2, status=sent (250 2.0.0 OK 1468488457 sl8si2007458pab.264 - gsmtp

I wonder that this trouble came from DNS issues @vine.domain.com, but I can not find where I correct the trouble first. I can not find proper information in terms of the issue on this website.

Here is a result of postfix -n . Thank you for your sincere support.

bash# /usr/sbin/postconf -n

alias_database = hash:/etc/postfix/aliases, hash:/var/spool/ml/etc/aliases

alias_maps = hash:/etc/postfix/aliases, hash:/var/spool/ml/etc/aliases

allow_mail_to_commands = alias,forward,include

allow_percent_hack = no

command_directory = /usr/sbin

daemon_directory = /usr/lib/postfix

debug_peer_level = 2

default_destination_concurrency_limit = 10

default_privs = fml

inet_interfaces = all

local_destination_concurrency_limit = 2

mail_owner = postfix

mail_spool_directory = /var/spool/mail

mydestination = $myhostname, localhost.$mydomain $mydomain, somedomain.to

mydomain = domain.com

myhostname = vine.domain.com

mynetworks = 210.251.xx.xx/28, 127.0.0.0/8

mynetworks_style = subnet

myorigin = $mydomain

queue_directory = /var/spool/postfix

relay_domains = $mydestination

smtpd_banner = $myhostname ESMTP $mail_name ($mail_version)

virtual_maps = hash:/etc/postfix/virtual

Answer 1

Thanks for the actual domain :)

I think your problem may be that you don't have an MX record for mjp.jp

dig -t mx mju.jp

; <<>> DiG 9.8.1-P1 <<>> -t mx mju.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32458 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION: ;mju.jp. IN MX

;; AUTHORITY SECTION: mju.jp. 300 IN SOA
01.dnsv.jp. hostmaster.dnsv.jp. 1468466454 3600 900 604800 30

Since your server announces itself as vine.mjp.jp there needs to be a data record of requested type (one specifying who is the mail server) for the mjp.jp domain.

You might also want to see if you can get a PTR record set up for that IP, as it will improve delivery possibilities