Gerhardpet
asked on
SBS 2011 not sending emails
I have an SBS 2011 not sending emails. I had other issues this morning with an open question here https://www.experts-exchange.com/questions/28654833/URGENT-SBS-2011-in-reboot-loop-from-Windows-Updates.html
Now none of the emails are going out. In the Exchange Management Console queue viewer I have this error "451 4.4.0 DNS query failed". It keeps on retrying but no luck.
I use the ISP SMTP server for sending emails. I can telnet the SMTP server no problem. It does not appear to be an DNS issue.
Now none of the emails are going out. In the Exchange Management Console queue viewer I have this error "451 4.4.0 DNS query failed". It keeps on retrying but no luck.
I use the ISP SMTP server for sending emails. I can telnet the SMTP server no problem. It does not appear to be an DNS issue.
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http://exchangeserverpro.com/messages-queuing-error-451-4-4-0-dns-query-failed/