[Indimail-support] Emails are getting bounced due to non existing DNS email address

[shabana amreen]

Happy new year Manvendra! 

Emails are being bounced by the destination server due to a bad sender address. log says non existing DNS email but emails from the same address are being routed and delivered successfully to other addresses. Please advise.

Checks done:

No firewall blocking

Added @domainname entry  in /etc/indimail/control/nodnscheck  

Verified there's no blacklist in /var/indimail/etc/tcp.smtp 

-Shabana

[Manvendra Bhangui]

On Fri, 3 Jan 2020 at 22:26, shabana amreen <shabanaa...@gmail.com> wrote:
>
> Emails are being bounced by the destination server due to a bad sender address. log says non existing DNS email but emails from the same address are being routed and delivered successfully to other addresses. Please advise.
>

What is the exact line in /var/log/indimail/smtpd.25/current?

> Checks done:
> No firewall blocking
> Added @domainname entry in /etc/indimail/control/nodnscheck

Which version of indimail are you using?
It is /var/indimail/control/nodnscheck in the older versions. IIRC you
are using the ancient version of indimail. What is the output of the
command

# rpm -qf /var/indimail

> Verified there's no blacklist in /var/indimail/etc/tcp.smtp

All you have to do is the following to test the entry for the domain
in nodnscheck.
Assume that the domain is kdjffkjd.com

$ telnet 0 25
Trying 0.0.0.0...
Connected to 0.
Escape character is '^]'.
220 indimail.org (NO UCE) ESMTP IndiMail 1.224 Fri, 3 Jan 2020 22:30:43 +0530
mail from:<ab...@kdjffkjd.com>
553 Bad sender's system address (#5.1.8)
quit
221 indimail.org closing connection
Connection closed by foreign host.

Then make the entry for the domain @kdjffkjd.com in
/var/indimail/control/nodnscheck

$ telnet 0 25
Trying 0.0.0.0...
Connected to 0.
Escape character is '^]'.
220 indimail.org (NO UCE) ESMTP IndiMail 1.224 Fri, 3 Jan 2020 22:44:44 +0530
mail from:<ab...@kdjffkjd.com>
250 ok
quit
221 indimail.org closing connection
Connection closed by foreign host.

NOTE: Don't Top Post and when replying remove unnecessary comments

[Shabana A. Amreen]

Emails are being bounced by the destination server due to a bad sender address. log says non existing DNS email but emails from the same address are being routed and delivered successfully to other addresses. Please advise.


What is the exact line in /var/log/indimail/smtpd.25/current?

@400000005e0f2cd00b4fd214 qmail-smtpd: pid 115034 from ::ffff:143.220.15.132 Non-existing DNS_MX: MAIL FROM:<spl...@xxx.org> SIZE=3812

Which version of indimail are you using?

It is /var/indimail/control/nodnscheck in the older versions. IIRC you are using the ancient version of indimail. What is the output of the command.

# rpm -qf /var/indimail
indimail-2.2-28.1.x86_64

> Verified there's no blacklist in /var/indimail/etc/tcp.smtp

All you have to do is the following to test the entry for the domain in nodnscheck.
Assume that the domain is kdjffkjd.com

$ telnet 0 25
Trying 0.0.0.0...
Connected to 0.
Escape character is '^]'.
220 indimail.org (NO UCE) ESMTP IndiMail 1.224 Fri, 3 Jan 2020 22:30:43 +0530 mail from:<ab...@kdjffkjd.com>
553 Bad sender's system address (#5.1.8) quit
221 indimail.org closing connection
Connection closed by foreign host.

Then make the entry for the domain @kdjffkjd.com in /var/indimail/control/nodnscheck

$ telnet 0 25
Trying 0.0.0.0...
Connected to 0.
Escape character is '^]'.
220 indimail.org (NO UCE) ESMTP IndiMail 1.224 Fri, 3 Jan 2020 22:44:44 +0530 mail from:<ab...@kdjffkjd.com>
250 ok
quit
221 indimail.org closing connection
Connection closed by foreign host.

Test has been done by removing the entries from nodnscheck, did telnet, again added @domainname in nodnscheck, still no go. Thanks.

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[Manvendra Bhangui]

On Tue, 7 Jan 2020 at 00:05, Shabana A. Amreen
<Shabana...@mindtree.com> wrote:
>
> Emails are being bounced by the destination server due to a bad sender address. log says non existing DNS email but emails from the same address are being routed and delivered successfully to other addresses. Please advise.
>
>
> What is the exact line in /var/log/indimail/smtpd.25/current?
> @400000005e0f2cd00b4fd214 qmail-smtpd: pid 115034 from ::ffff:143.220.15.132 Non-existing DNS_MX: MAIL FROM:<spl...@xxx.org> SIZE=3812
>

Have you added @xxx.org in the control file nodnscheck

> Which version of indimail are you using?
> It is /var/indimail/control/nodnscheck in the older versions. IIRC you are using the ancient version of indimail. What is the output of the command.
>
> # rpm -qf /var/indimail
> indimail-2.2-28.1.x86_64

Indimail 2.x will require restart of smtp after making changes to
control files. That's because indimail-2.x loads control file only
once during startup unlike indimail 1.x which loads the control file
for every SMTP connection.

# svc -d /service/qmail-smtpd.25
# svc -u /service/qmail-smtpd.25

>
> > Verified there's no blacklist in /var/indimail/etc/tcp.smtp
>

> Test has been done by removing the entries from nodnscheck, did telnet, again added @domainname in nodnscheck, still no go. Thanks.
>

Can you confirm that you have exactly added @xxx.org as given in the SMTP log?
Also let me know the output of the following command

# file /etc/indimail/control/nodnscheck