zlacker

The hell are you complaining about unreachable contacts when your own abuse@ address is dead -

    Arrival-Date: Thu, 30 Aug 2018 00:00:00 +0200 (CEST)

    Final-Recipient: rfc822; abuse@zohocorp.com
    Original-Recipient: rfc822;abuse@zohocorp.com
    Action: failed
    Status: 4.7.1
    Remote-MTA: dns; mx2.zohocorp.com
    Diagnostic-Code: smtp; 451 4.7.1 Greylisted, try again after some time

This is from our MTA after 5 (FIVE) days of trying to deliver you a spam report, with all delivery attempts originating from the same IP.

And that's without getting into why you have a filter on your abuse@ address to begin with.

>>huhten+(OP)
If I had to guess they're probably rejecting the message further because it likely contains the spam itself.

This is a key error in their handling of their abuse@ address, it needs to be expected to receive spam.

>>lathia+d6
But if the diagnostic code were correct and it were just a grey listing, that would be okay, wouldn't it? Just clashes with the mentioned five days.

>>huhten+(OP)
Dear User,

Thank you for bringing this up. It was due to our greylist setting for *@zohocorp.com domain, we have now excluded the greylist for abuse addresses. Please resend your complaint to our abuse address. Regards, Zoho Account and Abuse Monitoring Desk.

>>huhten+(OP)
Further you can report to us using https://www.zoho.com/report-abuse/