SOLVED Reverse DNS does not match SMTP Banner

[DennisMidjord]

Hi,

MXToolBox reports that our reverse DNS does not match the SMTP Banner even though it should.
I've made the following changes:
Exim configuration:
Send mail from account’s dedicated IP address: Off
Reference /etc/mailhelo for outgoing SMTP HELO: On
Reference /etc/mailips for outgoing SMTP connections: On

smtp_banner = "${smtp_active_hostname} ESMTP Exim ${version_number}  \#${compile_number} ${tod_full} \n   We do not authorize the use of this system to transport unsolicited, \n   and/or bulk e-mail."

smtp_active_hostname =
${lookup{$interface_address}lsearch{/etc/mail_reverse_dns}{$value}{$primary_hostname}}

message_id_header_domain = $smtp_active_hostname

/etc/mailips:

*: 10.0.0.251

/etc/mail_reverse_dns:

10.0.0.251: pro5mail.example.com

/etc/mailhelo:

* : pro5mail.example.com

When trying to telnet, it reports the correct hostname:

[[email protected] ~]# telnet pro5mail.example.com 25
Trying *.*.*.251...
Connected to pro5mail.example.com.
Escape character is '^]'.

What could the issue be?

 

[cPanelMichael]

Hello,

Sometimes it's a false positive from the MXToolBox website due to the "Introduce a delay into the SMTP transaction for unknown hosts and messages detected as spam." option under the "ACL Options" tab in "WHM >> Exim Configuration Manager >> Basic Editor". See:

SOLVED - Reverse DNS does not match SMTP Banner (Problem)

Thank you.

 

[DennisMidjord]

Disabling that option temporarily also shows only green checkmarks on MXToolBox. Thanks, Michael!

 

[WorkinOnIt]

Following this for future reference as this was a great tip - once disabled it fixed my issue.

 

[Xzone9]

This issue and resolution is still valid. Works for me.

 

[sitespt]

Worked for us too. Thanks.