When you try to send an e-mail message via an SMTP/IMAP host, you may receive the error message “5.7.3 STARTTLS is required“. This article explains the possible causes for the “STARTTLS is required” error and how to fix it and send an email successfully. In my case, I encountered...
Installed a new catchall certificate on our Exchange 2013 server and linked it to SMTP and IIS.All is working as expected so I removed the old catchall certificate which expires next month but now STARTTLS is no longer available if I telnet to the Exchange 2013 server on port 25....
"The program cannot open the required dialog box because it cannot determine whether the computer named ... is joined to a domain". "The server does not support the requested critical extension." Exception "The server is not operational" "The specified user already exists" While Promoting a d...
All is working as expected so I removed the old catchall certificate which expires next month but now STARTTLS is no longer available if I telnet to the Exchange 2013 server on port 25. The below Application Error 12014 is logged referencing the removed catachall cert: ...
"The program cannot open the required dialog box because it cannot determine whether the computer named ... is joined to a domain". "The server does not support the requested critical extension." Exception "The server is not operational" "The specified user already exists" While Promoting a ...