Cannot Send Email to External Domain and Sendmail Reports "timeout waiting for input from xxx during client greeting"
(Doc ID 2405576.1)
Last updated on AUGUST 04, 2018
Applies to:Linux OS - Version Oracle Linux 5.0 and later
Cannot send email to external mail address.
# mailx -s "test-email-from-user" email@example.com < email-body.txt
Checking sendmail log file in /var/log/mailog:
server sendmail: xx: timeout waiting for input from <dest-maildsn.server> during client greeting
server sendmail: xx: to=<firstname.lastname@example.org>, ctladdr=<user@localhost> (503/501), delay=06:13:20, xdelay=00:15:01, mailer=esmtp, pri=660388, relay=dest-maildsn.server. [x.x.x.x], dsn=4.0.0, stat=Deferred: Connection timed out with dest-maildsn.server.
However, sending email to local server works.
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