1

Topic: Sender address rejected: Domain not found;

==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):
- Deployed with iRedMail Easy or the downloadable installer?
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

----

Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2

Re: Sender address rejected: Domain not found;

I am getting error domain not found even I have enabled this setting. in no_a_record.pcre

ucc-bsnl.co.in DUNNO
ucc-bsnl.co.in OK

3

Re: Sender address rejected: Domain not found;

Mar  1 10:04:28 srv1 postfix/smtpd[3423629]: NOQUEUE: reject: RCPT from esa2.hc280-12.ap.iphmx.com[139.138.44.152]: 450 4.1.8 <dltsupport@ucc-bsnl.co.in>: Sender address rejected: Domain not found; from=<dltsupport@ucc-bsnl.co.in> to=<xxx@sss.com> proto=ESMTP helo=<esa2.hc280-12.ap.iphmx.com>

4

Re: Sender address rejected: Domain not found;

"Domain not found" means the domain name is not resolvable by DNS query.

5

Re: Sender address rejected: Domain not found;

I know that but how can we allow the email to receive the email because the mail is important which originating from dltsupport@ucc-bsnl.co.in

6

Re: Sender address rejected: Domain not found;

You can whitelist the sender domain name in file /etc/postfix/sender_access.pcre.
For example:

/\^ucc-bsnl\.co\.in$/ OK