Dnia 21.10.2024 o godz. 19:36:45 Alexander Robohm via mailop pisze: > cause seems to be that Postfix itself doesn't perform the signing, > but delegates it to a milter. Wenn it delivers the message, it's > already signed, so when it encounters an SMTP server that doesn't > annouce 8BITMIME, you have to choose between breaking the signature > and not delivering at all. If it signed the message while delivering > it, this wouldn't happen. > Disabling 8BITMIME at some earlier point in the pipeline (say, on > the MSA) fixes this, but at the expense of breaking SMTPUTF8.
If I remember correctly, someone claimed to have worked around this problem by using Postfix multi instance with second instance dedicated specifically to send to Mimecast. The first instance does not sign email destined for Mimecast, and passes it on (using a dedicated transport) to the second instance. That second instance does not announce 8BITMIME, so when first instance sends mail to it it is converted to QP. Then the second instance signs it and sends it out. I might be remembering something wrong but I think I saw this either here on this list or on Postfix list recently. -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub." _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
