Situation: Web server that sends out mail. Configured with SMTP service for this purpose.
Problem 1: Some of emails being relayed by the local SMTP service were failing with “550 not local host gmail.com, not a gateway” (where gmail.com is the domain of the mail in this example). This was domain specific.
Problem 2: Some relay SMTP servers [...]
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SMTP Woes
Posted in Network and Ops on June 21, 2007 | Leave a Comment »