- #Ipage email outlook error 421 cannot connect to smt update#
- #Ipage email outlook error 421 cannot connect to smt upgrade#
- #Ipage email outlook error 421 cannot connect to smt pro#
#Ipage email outlook error 421 cannot connect to smt update#
To fix these issues for Outlook for Microsoft 365, update your Office installation to version 2008 (Build 13127.20508) or a later version. This one-time process may take more than 15 minutes to finish, and performance may be affected while the optimization is in progress.
#Ipage email outlook error 421 cannot connect to smt upgrade#
Your mailbox is currently being optimized as part of an upgrade to Outlook 2016.
#Ipage email outlook error 421 cannot connect to smt pro#
I tried to change the following variables: Smtp-server: 535 5.7.3 Authentication unsuccessful S ssl-verify=ignore I always get the return below from the Office365 server. I tried to run: mailx -v -s "Now is `date`" \ Allow incoming & outgoing SMTP traffic over port 25 and 587 on my firewall for all Office365's IP addresses Setup an Office 365 account with an Essential subscription
Setup connector in Office 365 exchange to add my public IP addresses as trust I am trying to send SMTP email from the Linux mailx command however, no matter how I try, the return from the server is always Authentication unsuccessful.