HOW TO DISABLE IPV6 IN EXIM VESTACP

October 21, 2015   /   by Marco  / Categories :  Google, Websites
exim.conf disable ipv6

Strangely, today an email delivery failed and I decided to investigate further. The email subject was “Mail delivery failed: returning message to sender

The content in the bounced email was:

[codesyntax lang=”php”] [/codesyntax]

 

I’m using VPS hosting with VESTACP and it currently doesn’t support IPV6. However, for some strange reason EXIM (the mail transfer agent) is using IPV4 and also IPV6. I checked this by running the command:

[codesyntax lang=”php”] [/codesyntax]

 

EXIM IPv6 check

What I needed to do was disable IPv6 from EXIM so after some research all I had to do was go into etc/exim/exim.conf  and add the following line:

[codesyntax lang=”php”] [/codesyntax]

 

exim.conf disable ipv6

Save the file and then restart exim by using the following command:

[codesyntax lang=”php”] [/codesyntax]

 

Then check to make sure exim is no longer using IPV6 by using the command:

[codesyntax lang=”php”] [/codesyntax]

exim.conf disable ipv6 after change

You will now see that IPv6 is no longer listed.

RESOURCES
List of resources related to this article:

VESTACP – Open Source Free Control Panel

EXIM – Information about Exim email mailer

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