On Mar 5, 2010, at 1:33 PM, Zachary Frederick wrote: > We have been having a problem emailing to a customer whose server is hosted > by The Planet (http://www.theplanet.com/). Our mail server is hosted in-house > on a comcast business connection. > > IP address of our server is: 173.13.45.23 > > Customers mail server is: 69.93.203.243 >
I can get there from Comcast Business [ch...@abydos ~]$ nc 69.93.203.243 25 220 ******************************************************************************************** ehlo smtps.net 250-securemail.insurancewebsitebuilder.com Hello smtps.net [173.11.102.7], pleased to meet you. 250-ENHANCEDSTATUSCODES 250-SIZE 250-XXXA 250-ETRN 250-XXXB 250-DSN 250-CHECKPOINT 250-8BITMIME 250-AUTH CRAM-MD5 PLAIN LOGIN DIGEST-MD5 250-XXXXXXXC 250 XXXD quit 221 2.0.0 securemail.insurancewebsitebuilder.com closing connection That's almost certainly a PIX/ASA with fixup enabled (like Jay said). It's been known to cause many interoperability problems. The solution is pretty simple: no fixup protocol smtp 25 -- bk
