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On 09 February 2019 at 20:48 Juri Haberland via dovecot <
<a href="mailto:dovecot@dovecot.org">dovecot@dovecot.org</a>> wrote:
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On 09/02/2019 10:44, Aki Tuomi via dovecot wrote:
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For some reason mailman failed to "munge from" for senders with dmarc policy ;(
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It's now configured to always munge to avoid this again.
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I'd say, let Mailman throw all people off the list that have enabled DMARC
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checking without using exceptions for the lists they are on. It's a known
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fact that DMARC does not cope well with mailing lists. Blindly enabling
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DMARC checks without thinking about the consequences for themselves should
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not be the problem of other well behaving participants.
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The problem is that it would drop all gmail users for a start, which there are plenty of. Also judging from the amount of bounces ww got it seemed like half the subscribers would drop out.
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Most people use OpenDMARC and there are patches to mark certain hosts as
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mailing lists senders, so it is possible.
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Wonder how many would do this though?
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And everyone using p=reject should think about it as well - as I said,
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DMARC does not play well with mailing lists, so setting p=reject on a
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domain used to participate on mailing lists is not wise, to say the least.
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You should not follow Yahoo and AOL - you know, why they did it, don't you?
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Unfortunately this is usually required by many common providers such as microsoft and google, otherwise they refuse your mail.
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And Aki, please go back to "munge only if needed" - munging all messages
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leads to a really bad "user experience".
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It does not seem to work correctly. I'll review the settings when we manage to upgrade to mailman3
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Thanks.
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Hope you understand .
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Aki
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Back to lurking,
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Juri
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---
<br>Aki Tuomi
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