Re: [mailop] Google unsolicited mail rejected with 421

Most likely the reasoning behind something like this is dkim replay attacks, where a message with a single recipient is re-sent to a large number of recipients. Of course mailing lists should be exempted, the challenge is if you reply to both the list and the person directly, the reply to the

Re: [mailop] 172.245.92.88 (HostPapa / Colocrossing) phishing source - not correctly registered @ ARIN ?

Benoit Panizzon via mailop skrev den 2024-03-19 09:03: In the meantime, it scores a decent number of spam points due to being in various blacklists: [172.245.92.88 listed in dnsrbl.swinog.ch] [172.245.92.88 ]