Topic: NOQUEUE: reject: RCPT from unknown
==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.6
- Linux/BSD distribution name and version: FreeBSD 10.3 64bit
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? No
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
mail postfix/smtpd[53458]: NOQUEUE: reject: RCPT from unknown[195.142.244.243]: 450 4.1.8 <ekstre@vakifbank.com.tr>: Sender address rejected: Domain not found; from=<ekstre@vakifbank.com.tr> to=<rgince@seyhan.bel.tr> proto=ESMTP helo=<prv4mail.vakifbank.com.tr>
Jun 21 10:11:47 mail postfix/smtpd[53556]: warning: restriction `reject_authenticated_sender_login_mismatch' ignored: no SASL support
Jun 21 10:11:47 mail postfix/smtpd[53556]: warning: restriction `reject_unauthenticated_sender_login_mismatch' ignored: no SASL support
warning: 131.213.11.185.zen.spamhaus.org: RBL lookup error: Host or domain name not found. Name service error for name=131.213.11.185.zen.spamhaus.org type=A: Host not found, try again
NOQUEUE: reject: RCPT from unknown[209.85.217.179]: 450 4.1.8 <hasanalpinan@gmail.com>: Sender address rejected: Domain not found; from=<ayse@gmail.com> to=<hasan@seyhan.bel.tr> proto=ESMTP helo=<mail-ua0-f179.google.com>
i am getting this errors. server always reject emails. i need help. i also checked DNS; DNS resolve addresses.
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All problem caused by postfix. In a normal operation Postfix copies the file /etc/resolv.conf to /var/spool/postfix/etc/resolv.conf upon startup. On my server it's not. So this issue caused by an old resolv.conf file in postfix spool directory. Everything works now.