Is there a hook for modifying a To: field?

[Kurt Hackenberg]

On Tue, Aug 25, 2020 at 01:46:52PM +0100, Chris Green wrote:

>Here's the headers, rather verbose I'm afraid:-
...
>From: NWY6 <nowayhosey6 at gmail.com>
...
>To: "'David Eyre'" <mrloop at gmail.com>,
>	"'ixion'" <ixion at ixion.org.uk>
...
>List-Post: <mailto:ixion at ixiemaster.ixion.org.uk>

Two different addresses for the list.  Which one is correct?

Do all messages from the list have this mismatch, or only messages
from this sender?  If all of them, I suspect misconfiguration of the
mailing list software.  If only those from this sender, I suspect that
he has an incorrect list address stored locally.