On 2022-09-29, Johnnie W Adams via Exim-users <exim-users@exim.org> wrote: > Hi, folks, > > We have an unusual mail routing topology, where mail passes through > our SMTP server, through LISTSERV, and then back through our SMTP server. > > We are failing DMARC for reasons I think having to do with when the > message is signed by DKIM. > > I +think+ the issue is that the DKIM signature from our SMTP server is > from the first pass through and not the second pass. So what I would like > to do is tell Exim to remove any DKIM signatures from inbound mail. That > way, when mail leaves our data center, it'll be signed only at the point of > departure. > > Can this be done? It's not obvious from the documentation.
headers can be stripped on arrivial using headers_remove in an ACL or on delivery using remove_headers in a router or transport You probablly want to strip the DKIM headers either before delivering them to the listserver (in the transport) or upon receiving them from it in an ACL. -- Jasen. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
