Hello, I am an email user at Vodafone. When I want to send an email, the red warning sign in the left window often appears to the right of the Mail address line (the connection failed).
As proposed by Vodafone, I have the following settings:
Security Policy= SSL/TLS when available
The same settings work on Android with no problems.
What am I doing wrong?
Try totally disabling your VPN and Antivirus applications.
Go back to Menu > Accounts.
For IMAP, set the port to 993, and the security policy to Use SSL/TLS on special port (legacy)
For SMTP, set the port to 587, and the security policy to Force usage of SSL/TLS
Click on Save & Close and restart eM Client.
Thank you, but as far as I know my environment is not a VPN. And the only antivirus is defender from MS
Then give @Gary recommendation a shot…