Wietse Venema skrev den 2023-01-12 17:51:
No. If SPF fail DMARC will fail too.No. If DKIM passes then DMARC should too (ncessary and sufficient).
dmarc specs allow for spf pass only, where there is no dkim signed, eg if mail is not fully aligned it does not break spf pass only
and spf does allow v=spf1 +all and all other variants of more then 256 allowed ips, sadly designed for unaligned mail
