> On 17/11/2023 12:38 EET Nick Lockheart <fo...@ageofdream.com> wrote: > > > Now that we've got our new mail server going and the DMARC reports are > coming in, I'm finding a lot of DMARC failures for messages that I'm > sending to this list. > > It seems that when I send a message to this list, the list software > forwards it to other people on my behalf, but uses my email address in > the header_from. > > This results in an SPF failure, because SPF only allows our MX to send > mail for our domain. > > The DKIM check is also failing. I think the list software may be re- > writing the message bodies. > > Another user that I replied to on this list a day ago said my list mail > went to spam on his gmail. > > 1. Will our domain reputation be harmed by having a lot of copies of > the same messages going to a bunch of different people on different > ISPs and all of them failing DMARC? > > It seems that some places are using databases that look for duplicate > content sent to multiple recipients to identify bulk mail and spam. > > 2. Is there any way to mitigate DMARC issues for mailing lists? It > seems like the mailing list software should be sending out the emails > as itself, not as the user that submitted the message. > > > > > Now that we've got our new mail server going and the DMARC reports are coming > in, I'm finding a lot of DMARC failures for messages that I'm sending to this > list. > > It seems that when I send a message to this list, the list software forwards > it > to other people on my behalf, but uses my email address in the header_from. > > This results in an SPF failure, because SPF only allows our MX to send mail > for > our domain. > > The DKIM check is also failing. I think the list software may be re-writing > the > message bodies. > > Another user that I replied to on this list a day ago said my list mail went > to > spam on his gmail. > > 1. Will our domain reputation be harmed by having a lot of copies of the same > messages going to a bunch of different people on different ISPs and all of > them > failing DMARC? > > It seems that some places are using databases that look for duplicate content > sent to multiple recipients to identify bulk mail and spam. > > 2. Is there any way to mitigate DMARC issues for mailing lists? It seems like > the mailing list software should be sending out the emails as itself, not as > the user that submitted the message. > > >
There is an ARC signature, and you need to somehow whitelist the key used to sign it. Then hopefully it is less failing. Aki _______________________________________________ dovecot mailing list -- dovecot@dovecot.org To unsubscribe send an email to dovecot-le...@dovecot.org
