Hi, Suddenly, since a a few days, Outlook 2013 does not send emails anymore. It does not give any error message as it is unable to finish the task, it just churns and churns infinitely until I end the task in Task Manager. With the receiving part it has no problems. On verifying the account settings, these seem all in order and each account even sends and receives the "Microsoft Outlook Test Message". I also checked the net, but found no solutions. Some random posts suggested "encryption problems", but that was not so in my case. I do have encryption certificates for secure mail, but do send encrypted emails. I also changed the settings from secured to unsecured mail, but the problem remains the same. The problem probably occurred soon after the Regular Update and so I also "system restored" just in case one of those caused the problem, but it didn't make any difference. Otherwise Outlook was functioning flawlessly. Outgoing secure mail ports are 995/587 on my regular ISP and 993/465 om my private server. None of them work, therefore it must be the Outlook malfunctioning. Any suggestions how to fix this problem?