On 5/3/2014 7:54 AM, post...@nisny.com wrote: > On , wie...@porcupine.org wrote: ... >>> relay=mx4.icloud.com.akadns.net[17.172.34.67]:25, delay=177, >>> delays=0.3/0.01/177/0, dsn=4.4.2, status=deferred (lost >>> connection with mx4.icloud.com.akadns.net[17.172.34.67] while receiving >>> the initial server greeting)
17.172.34.67 >> 0.3 = No congestion within the Postfix queue. >> 0.01 = TCP completes immediately. >> 177 = Postfix waits for the 220 greeting until the connection is >> dropped. >> >> I suggest that you take Postfix out of the loop, and diagnose this >> further with plain old telnet. >> >> Wietse > > Wietse, thank you for your efforts. Telnet isn't telling me anything new: > > Trying 17.172.34.70... > Connected to st11p00mm-mx006.me.com. > Escape character is '^]'. > 220 st11p00mm-smtpin012.mac.com -- Server ESMTP (Oracle Communications > Messaging Server 7u4-27.08(7.0.4.27.7) 64bit (built Aug 22 2013)) 17.172.34.70 > As you can see, I'm getting an immediate 220 from them which postfix > apparently is not getting. I can, of course, continue the telnet > session and send a complete email which is received by the recipient. Note that you are manually telnet testing against a different host than the one logged by Postfix with the greet timeout. Also note there are 12 MX hosts in the me.com/mac.com inbound farm. Depending on the nature of the problem, you may only see it with 17.172.34.67, and the other 11 may be fine. You need to perform proper and thorough testing in order to determine if this problem exists with only one of the 11 farm hosts, or more than one, and if it is transient or ongoing. > ;; QUESTION SECTION: > ;mac.com. IN MX > > ;; ANSWER SECTION: > mac.com. 3600 IN MX 10 mx4.mac.com.akadns.net. > mac.com. 3600 IN MX 10 mx3.mac.com.akadns.net. > mac.com. 3600 IN MX 10 mx1.mac.com.akadns.net. > mac.com. 3600 IN MX 10 mx5.mac.com.akadns.net. > mac.com. 3600 IN MX 10 mx2.mac.com.akadns.net. > mac.com. 3600 IN MX 10 mx6.mac.com.akadns.net. > > ;; ADDITIONAL SECTION: > mx3.mac.com.akadns.net. 300 IN A 17.172.34.65 > mx5.mac.com.akadns.net. 300 IN A 17.172.34.69 > mx2.mac.com.akadns.net. 300 IN A 17.172.34.12 > mx4.mac.com.akadns.net. 300 IN A 17.172.34.67 > mx2.mac.com.akadns.net. 300 IN A 17.172.34.11 > mx4.mac.com.akadns.net. 300 IN A 17.172.34.66 > mx6.mac.com.akadns.net. 300 IN A 17.172.34.71 > mx1.mac.com.akadns.net. 300 IN A 17.172.34.9 > mx1.mac.com.akadns.net. 300 IN A 17.172.34.10 > mx3.mac.com.akadns.net. 300 IN A 17.172.34.64 > mx5.mac.com.akadns.net. 300 IN A 17.172.34.68 > mx6.mac.com.akadns.net. 300 IN A 17.172.34.70 > ;; QUESTION SECTION: > ;me.com. IN MX > > ;; ANSWER SECTION: > me.com. 3600 IN MX 10 mx4.me.com.akadns.net. > me.com. 3600 IN MX 10 mx5.me.com.akadns.net. > me.com. 3600 IN MX 10 mx3.me.com.akadns.net. > me.com. 3600 IN MX 10 mx6.me.com.akadns.net. > me.com. 3600 IN MX 10 mx1.me.com.akadns.net. > me.com. 3600 IN MX 10 mx2.me.com.akadns.net. > > ;; ADDITIONAL SECTION: > mx1.me.com.akadns.net. 300 IN A 17.172.34.9 > mx6.me.com.akadns.net. 300 IN A 17.172.34.70 > mx4.me.com.akadns.net. 300 IN A 17.172.34.66 > mx2.me.com.akadns.net. 300 IN A 17.172.34.12 > mx5.me.com.akadns.net. 300 IN A 17.172.34.69 > mx4.me.com.akadns.net. 300 IN A 17.172.34.67 > mx3.me.com.akadns.net. 300 IN A 17.172.34.65 > mx6.me.com.akadns.net. 300 IN A 17.172.34.71 > mx1.me.com.akadns.net. 300 IN A 17.172.34.10 > mx5.me.com.akadns.net. 300 IN A 17.172.34.68 > mx2.me.com.akadns.net. 300 IN A 17.172.34.11 > mx3.me.com.akadns.net. 300 IN A 17.172.34.64 Cheers, Stan
