Hello,

Since a few weeks, we've a problem when we send e-mail to MTA of Yahoo (yahoo.com or yahoo.fr)
The log in our postfix server are:

Jan 25 09:27:37 emailfrontal1 postfix/error[12384]: 19128F857F: to=<patrickjallut@yahoo.fr>, relay=none, delay=164344, delays=164344/0/0/0.03, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mx-eu.mail.am0.yahoodns.net[77.238.184.241] while sending end of data -- message may be sent more than once)
Jan 25 09:28:00 emailfrontal1 postfix/smtp[12670]: DAC59F88F9: to=<bzwahlenmattei@yahoo.com>, relay=mta5.am0.yahoodns.net[66.94.237.139]:25, delay=260738, delays=260715/0.01/12/11, dsn=4.4.2, status=deferred (lost connection with mta5.am0.yahoodns.net[66.94.237.139] while sending end of data -- message may be sent more than once)

When we try a telnet connection it works but the sessions is closed after 5 sec:

telnet mx-eu.mail.am0.yahoodns.net 25
Trying 77.238.184.241...
Connected to mx-eu.mail.am0.yahoodns.net (77.238.184.241).
Escape character is '^]'.
220 *********************************************************

We don't see any packet loss between yahoo and us.

Is anyone have seen this problem?
Can someone from Yahoo contact me offlist?

Thanks for your help.
Regards
Jonathan

-- 
Jonathan Jeanneret
IP Systems Engineer
Service Industriels Lausanne
Citycable - www.citycable.ch
jonathan.jeanneret@citycable.ch
Phone: +41 21 315 96 40
Mobile: +41 79 506 28 57