SMTP mail - getting error 550 5.7.1 Unable to relay for
I did set up mailhub. Could see entry in /etc/ssmtp/ssmtp.conf as expected.
Created SMTP configuration from System -> Device -> SMTP
Later I issued the following commands:
modify /sys outbound-smtp mailhub xxxxx.sierracollege.edu:25 save /sys config
I tested with following mail command: echo "Test message" | mail -vs "Test message" user@sierracollege.edu
But I am getting error. I could telnet to mail server. Here is the log
echo "Test message" | mail -vs "Test message" user@sierracollege.edu [<-] 220 xxxxx.sierracollege.edu Microsoft ESMTP MAIL Service, Version: 8.5.9600.16384 ready at Mon, 2 Jul 2018 11:34:45 -0700 [->] HELO f5-xxxxxxx.sierracollege.edu [<-] 250 xxxxx.sierracollege.edu Hello [10.16.0.5] [->] MAIL FROM: [<-] 250 2.1.0 root@f5-xxxxxxx.sierracollege.edu....Sender OK [->] RCPT TO: [<-] 550 5.7.1 Unable to relay for user@sierracollege.edu send-mail: RCPT TO: (550 5.7.1 Unable to relay for user@sierracollege.edu)
Can someone suggest how to resolve this problem.
Thanks in advance