Exim4 SPF ipv6 OVH

Kernels & Hardware, configuring network, installing services

Exim4 SPF ipv6 OVH

Postby pvincent » 2017-03-28 05:45

I've struggled for a while configuring exim4 with Internet access through a dedicated (OVH) server.
Finally I succeeded, thus I post this message to help other people...

After dpkg-reconfigure exim4-config => Internet, I try sending an email to my gmail account.
It fails. The failure complains about 'SPF ipv6 PTR record' not recognized by Gmail.
I guess this is an OVH issue cause this provider does return a correct PTR record for my ipv4 address but not for the IPv6 address.

So, the solution is to force exim4 to send through IPv4 only.
But that's not so easy, because by default Exim4 tries IPv6, even if you configure for an only one IP address like '0.0.0.0'.
To force IPv4 only, just edit the file '/etc/exim4/exim4.conf.template', insert on top :
disable_ipv6 = true

Do not edit '/etc/exim4/update-exim4.conf.conf', cause it won't take account this variable !

Then,
Code: Select all
update-exim4.conf && service exim4 restart
exim -bP disable_ipv6 # to verify configuration
# => disable_ipv6
pvincent
 
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