I am using a Centos 6.5 machine as a mail server with sendmail as the MTA. I have a problem with a delay of sendmail presenting its banner so that the process of accepting e-mail can begin. The log files demonstrate as much as a 2 minute delay between the connection and the banner presentation. +ACM-telnet Mail.DOMAIN.com 25 Connected to mail. Escape character is '+AF4AXQ'. +ADw two minute delay before the next line is presented+AD4 h220 Mail.DOMAIN.com. ESMTP Sendmail 8.14.4/8.14.4+ADs Sun, 23 Mar 2014 10:17:44 -0500 Log entries on the mail server for the above connection: Mar 23 10:16:05 Mail sendmail+AFs-31229+AF0: NOQUEUE: connect from NAME.DOMAIN.com +AFs-10.0.0.187+AF0 Mar 23 10:17:44 Mail sendmail+AFs-31229+AF0: AUTH: available mech+AD0-GSSAPI CRAM-MD5 DIGEST-MD5, allowed mech+AD0-EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN I have made the observation that if I put in the following line in the access file the 2 min delay goes away Connect:10.0.0.187 RELAY Obviously I can not set up a relay for every ip address, but this does solve the problem for internal network delivery of mail to the mail server. I am using named for local dns service and have not been able to identify any errors or problems. When I evaluate nslookup NAME.DOMAIN.com 127.0.0.1 I appropriately get 10.0.0.187 So far I am stumped on this problem, if any of you have suggestions I would appreciate your help Greg Ennis
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