Hello, some IONOS customer mail domains seem to have a default DMARC entry that points to dmarc.ionos.de. This entry is invalid if i'm not fully mistaken:
$ dig +short txt dmarc.ionos.de "v=DMARCv1; p=none;" per https://datatracker.ietf.org/doc/html/rfc7489 the only allowed value for the version field is DMARC1. > v: Version (plain-text; REQUIRED). Identifies the record retrieved > as a DMARC record. It MUST have the value of "DMARC1". The value > of this tag MUST match precisely; if it does not or it is absent, > the entire retrieved record MUST be ignored. It MUST be the first > tag in the list. Anyone from IONOS here that could take a look at this? This causes issues on some DMARC parsers which, in some cases, results in rejections - even though the parsers should ignore the field, but this is a different story. Best regards, Matthias _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
