Re: Is there a way to avoid using IPv6 in outgoing SMTP connections?

On Fri, 19 Jun 2026, Fabio Muzzi via Exim-users wrote:

[...]
> This takes me to the point: is there no way of telling Exim to use only 
> ipv4 in outgoing smtp connections, apart from disabling v6 completely in 
> Exim (with disable_ipv6=true), thus rejecting also incoming v6 smtp 
> connections?

I'm using "ipv4_prefer" in the dnslookup driver; also "ipv4_only".

I had assumed both to exist for exactly the kind of reasons you describe.

But neither is likely to be a good solution within OVH as in my experinece 
the IPv4 address will also have a bad reputation from neighbours in the 
same ASN.

-- 
Mark

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