mail() putting IPv6 address into headers instead of IPv4 address, failing spam check

Robert Simpson

Registered
Jun 8, 2012
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Root Administrator
Hi folks,

For some reason my PHP mail() is sending messages using the IPv6 address instead of IPv4 and it's causing Gmail and Hotmail to junk the messages.

Any ideas as to how I can force it to send it using IPv4?


Cheers,
Robert

PS. This is a bit on the urgent side so any help is greatly appreciated!

- - - Updated - - -

This is what it's giving me:

Received: from [server domain] ([2a02:af8:1:1100::3950])
by mx.google.com with ESMTPS id fs4si1805385wib.9.2013.06.04.08.59.10
for <[my email]>
(version=TLSv1 cipher=RC4-SHA bits=128/128);
Tue, 04 Jun 2013 08:59:10 -0700 (PDT)
Received-SPF: neutral (google.com: 2a02:af8:1:1100::3950 is neither permitted nor denied by best guess record for domain of [email protected][server domain]) client-ip=2a02:af8:1:1100::3950;
Authentication-Results: mx.google.com;
spf=neutral (google.com: 2a02:af8:1:1100::3950 is neither permitted nor denied by best guess record for domain of [email protected][server domain]) [email protected][server domain]
 

cPanelMichael

Technical Support Community Manager
Staff member
Apr 11, 2011
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Twitter
Hello :)

You can try disabling IPV6 in Exim by browsing to:

"WHM Home » Service Configuration » Exim Configuration Manager » Advanced Editor"

Scroll down until you see "Add additional configuration setting" (it's just above Section: BEGINACL"). Then, select the following option from the drop-down menu:

disable_ipv6

Set the value to:

true

Scroll to the very bottom of the page, and click "Save".

Thank you.