Hello,
I am tring to send email to one of my client that is using symantec email service, but my email got rejected, I tried to contacte symantec support by email and the same thing happened.
Aug 15 11:35:29 ns526666 postfix/smtp[15163]: 8FABD23000C2: host cluster4.us.messagelabs.com[216.82.251.34] refused to talk to me: 501 Connection rejected by policy [7.7] 14504, please visit www.messagelabs.com/support for more details about this error message.
Aug 15 11:35:29 ns526666 postfix/smtp[15163]: 8FABD23000C2: host cluster4.us.messagelabs.com[216.82.242.33] refused to talk to me: 501 Connection rejected by policy [7.7] 5506, please visit www.messagelabs.com/support for more details about this error message.
Aug 15 11:35:29 ns526666 postfix/smtp[15163]: 8FABD23000C2: host cluster4.us.messagelabs.com[216.82.242.179] refused to talk to me: 501 Connection rejected by policy [7.7] 8615, please visit www.messagelabs.com/support for more details about this error message.
Aug 15 11:35:29 ns526666 postfix/smtp[15163]: 8FABD23000C2: host cluster4.us.messagelabs.com[216.82.251.33] refused to talk to me: 501 Connection rejected by policy [7.7] 13016, please visit www.messagelabs.com/support for more details about this error message.
Aug 15 11:35:30 ns526666 postfix/smtpd[15152]: disconnect from unknown[188.51.65.105]
Aug 15 11:35:31 ns526666 postfix/smtp[15163]: 8FABD23000C2: to=<support.cloud@symantec.com>, relay=cluster4a.us.messagelabs.com[85.158.139.103]:25, delay=4.4, delays=0.91/0.01/3/0.45, dsn=4.0.0, status=deferred (host cluster4a.us.messagelabs.com[85.158.139.103] said: 421 Service Temporarily Unavailable (in reply to RCPT TO command))