i try to send a message from my gmail account to one of the addresses hosted by my mail server and get the following message:
Delivery to the following recipient failed permanently:
Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the server for the recipient domain xxxxxxxxx.com by mail.xxxxxxx.com. [xxx.xxx.xxx.xxx].
The error that the other server returned was: 554 5.7.1 Service unavailable; Client host [mail-we0-f180.google.com] blocked using blackhole.securitysage.com
i have never seen this message before and my mail server has always accepted gmail emails until today.
i found the following relevant lines in my
relay_domains = hotmail.com gmail.com, etc smtpd_delay_reject = yes smtpd_recipient_restrictions = reject_rhsbl_client blackhole.securitysage.com, reject_rhsbl_sender blackhole.securitysage.com,
i noticed that the
relay_domains entry does not have google.com - it only has gmail.com. so:
- has gmail recently changed the name of their mailserver?
- or has gmail (or my pc?) been hacked to reroute traffic through blackhole.securitysage.com?
i have no idea what the
reject_rhsbl_sender entries are. if someone can explain them to me that would be good. i just went to the
securitysage.com site and it says "site under reconstruction, 80% complete", so maybe my mail server is failing because it is not getting a confirmation from securitysage.com?