Ironport giving Errno 54 while sending and receiving email from
I think this issue would be strongly related to firewall or network issues as a timeout error would mean the appliance sent the initial connection for delivery out, it was established and when delivering the data, the connection had not received responses and eventually timed out and dropped.
I would suggest the following actions:
- Review your firewall logs for connections and packets from your appliance's delivery IP to the yahoo mail servers in the instances where these errors occur as it seems like packet loss or packets being interrupted by firewalls which can cause this.
And if you wish to see if the appliance is not delivering the data properly :-
Log into GUI > System Admin > Log Subscriptions > Create a new log
Log type -> Domain Debug Log > Domain name -> yahoo.com
Submit this log and commit this change.
Replicate this delivery issue so it tracks this down.
It is highly likely that the appliance sends all the data to the receiving side but no response is given back so the appliance treats this as a time-out and the connection is dropped.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...