Frank S. Bernhardt wrote: > I'm getting grief from Message Labs in that they are complaining that > they are receiving a '554 SMTP synchronization error' when they do a
So they send their HELO/EHLO before getting your server's greeting. There is a recent thread "SMTP protocol violation?" which covers this. > 3) When they do a telnet to us on port 25 they complain about a 'long' > delay and then the 554 message. Most probably they block your ident lookup and send no reject packet (tcp RST or icmp port-unreachable). So it's not your fault, but you could surely lower your timeout (rfc1413_query_timeout) from the 30s default (I have 2s). -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
