Hello, I'm having problems with some emails from the list, been classified as SPAM in my system because of DMARC failures. I'm not sure but this may be a problem with the list configuration. I attach the log for the failures in the last week. -- Angel L. Mateo Mart?nez Secci?n de Telem?tica ?rea de Tecnolog?as de la Informaci?n y las Comunicaciones Aplicadas (ATICA) http://www.um.es/atica Tfo: 868889150 Fax: 868888337 -------------- next part -------------- A non-text attachment was scrubbed... Name: dovecot_dmarc.csv.log.gz Type: application/gzip Size: 2339 bytes Desc: not available URL: <https://dovecot.org/pipermail/dovecot/attachments/20210308/12f905f4/attachment.gz>
On 08.03.21 07:43, ?ngel L. Mateo wrote:> Hello, > > I'm having problems with some emails from the list, been classified as > SPAM in my system because of DMARC failures. I'm not sure but this may > be a problem with the list configuration. > > > I attach the log for the failures in the last week.I have looked at some of the mails that you flagged as problematic and yes, those mails failed the DKIM check, even though this list seams to work without invalidating DKIM signatures. The problem of these specific mails is the fact, that they sign one or more of the following headers: - Reply-To - Sender - List-Id, List-Help, List-Unsubscribe, List-Subscribe, List-Post, List-Owner, List-Archive Of course these headers *will* be altered by most list software out there, so the senders have to change the way they sign their mails. Your only option is to either trust the ARC-headers or to whitelist all amil from this mailing list. Cheers, Juri
On 2021-03-08 07:43, ?ngel L. Mateo wrote:> I'm having problems with some emails from the list, been classified > as SPAM in my system because of DMARC failures. I'm not sure but this > may be a problem with the list configuration.what state of dkim is c= tag ?, if it contains simple, its not that simple since its more strong then relaxed if thats the case, it could be that 8bitmime is not being disabled before dkim signing :( reference from amavisd dkim howto is your dmarc test doing ARC test ?> I attach the log for the failures in the last week.does not help me helping you