That error message means your IP has a poor email reputation on Cisco Talos:
https://talosintelligence.com/reputation_center/
Regards
Bastiaan
Am 28.06.2022 um 12:09 schrieb Sidsel Jensen via mailop:
Hi
I'm trying to locate a contact to mx1.hc1932.iphmx.com - does anybody know who to reach out to? They don't respond through ab...@enom.com mailto:ab...@enom.com (which was the only address whois showed as everything else was heavily redacted)
I'm trying to solve a deliverability problem towards them:
host mx1.hc1932.iphmx.com[216.71.154.96] refused to talk to me: 554-esa6.hc1932.iphmx.com 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.
I guess mailop applies as "alternate means" ;-)
Kind Regards,
Sidsel Jensen
Architect of Deliverability and Abuse @ Open-Xchange
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