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PERM_FAILURE: SMTP Error (state 13): 550 Host x.x.x.x is listed in relays.ordb

Hi all,

I had this problem today and thought I would pass it on just in case anyone else could use the info.

Outgoing and internal email worked fine but senders of mail from outside (incoming) would receive the following bounce-back (or something similar):  "PERM_FAILURE: SMTP Error (state 13): 550 Host x.x.x.x is listed in relays.ordb.org"

After doing blacklist searches, checking Exchange config and checking with my ISP I found that "relays.ordb.org" is no longer in service and was still configured as an RBL Zone in Astaro.  Once I removed it everything worked again.

The strange thing is that "relays.ordb.org" has been down since Dec. 31st 2006 and did not cause an issue until this morning.


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