Conversion to 7BIT required but not supported

[Damian]

Hi,

what kind of MTA does your amavis forward to? That MTA does not announce
8BITMIME support. With a postfix this could have been achieved via
smtpd_discard_ehlo_keyword_address_maps.

> dsn: . 550 MtaRejected <someone at gmail.com> -> <someone at mydomain.tld>:
> on_succ=0, on_dly=1, on_fail=1, never=0, warn_sender=, DSN_passed_on=0,
> destiny=-3, mta_resp: "550 5.6.3 id=02074-04 - Rejected by next-hop MTA
> on relaying, Conversion to 7BIT required but not supported"