# Incoming email error **URL:** \ **Category:** Uncategorized\ **Created:** [June 25, 2023, 5:39pm UTC](https://forum.hestiacp.com/t/incoming-email-error/9895 "2023-06-25T17:39:23Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![eris](https://forum.hestiacp.com/user_avatar/forum.hestiacp.com/eris/32/1241_2.png) [@eris](https://forum.hestiacp.com/u/eris)\ **Post date:** [June 25, 2023, 5:46pm UTC](https://forum.hestiacp.com/t/incoming-email-error/9895/2 "2023-06-25T17:46:53Z")
smtp [H=mail.rdtlabs.com](http://H=mail.rdtlabs.com) [xxxxxx] X=TLS1.3:ECDHE\_SECP256R1\_\_RSA\_PSS\_RSAE\_SHA256\_\_AES\_256\_GCM:256 CV=no: SMTP error from remote mail server after RCPT TO:\<\>: 550-Rejected because 1xxxxxis in a black list at [zen.spamhaus.org](http://zen.spamhaus.org)\n550 Error: open resolver; [DNSBL Error Code - Open/public resolver - The Spamhaus Project](https://www.spamhaus.org/returnc/pub/3.228.170.210) > [@Spamhaus has gone mad](https://forum.hestiacp.com/t/spamhaus-has-gone-mad/7223): > > I haven’t got to the bottom of this yet, but thought I’d post about it in case anyone else is affected. A client running Hestia was complaining about not receiving mail. When I replied asking for more information, my own mail was rejected from his server saying my IP was banned at [zen.spamhaus.org](http://zen.spamhaus.org). However when I went to check at [https://check.spamhaus.org/](https://check.spamhaus.org/) its not listed. IP and all associated domain names are clear. I can’t figure out what’s going on. In the meantime, I’ve edited /etc/exim/dn… --- _[View the full topic](https://forum.hestiacp.com/t/incoming-email-error/9895)._