Hi, Please always contact the postmaster team via: https://postmaster.gmx.com/en/contact They will respond during business days.
Beides that, if you send me the IP I can check. Best regards Arne Allisat Head of Mail Application Security Product Management Applications 1&1 Mail & Media GmbH | Brauerstraße 48 | 76135 Karlsruhe | Germany Am 14.10.2020 um 02:09 schrieb Jeremy Weiss via mailop <mailop@mailop.org<mailto:mailop@mailop.org>>: Hello Mailops, I have a customer that is receiving the following error message from GMX.net<http://GMX.net>: gmx.net<http://gmx.net/> (mxgmx016) Nemesis ESMTP Service not available No SMTP service Bad DNS PTR resource record. For explanation visit https://www.gmx.net/mail/senderguidelines?ip=XX.XXX.XXX.XXX&c=rdns But this customer's PTR records look to be in order. Does anyone have a GMX.net<http://GMX.net> contact I could reach out to for more information? Thanks, Jeremy -- Mailgun<https://www.mailgun.com/> | Technical Account Manager Phone: 210.384.1815 Add me on LinkedIn<https://www.linkedin.com/in/weissjeremy/> _______________________________________________ mailop mailing list mailop@mailop.org<mailto:mailop@mailop.org> https://list.mailop.org/listinfo/mailop
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