Outlook mail server, “Cannot guarantee authenticity to which an encrypted connection is being established”.

[Thimios]

When Outlook desktop is send/receiving one of my email accounts, I get a message “Cannot guarantee authenticity to which an encrypted connection is being established”.

Is there a way to add my incoming/outgoing server (mail.xxxxxxx.gr) to exclusions?

Thank you for your support.

[Berny]

@Thimios Welcome. Please try this :

Settings >  Additional > Network > Manage exclusions > Enter SMTP & POP/IMAP server > Add  + reboot.