BrianFagioli writes: Fedora Linux 43 users upgrading to the latest Dovecot mail server discovered something rather unsettling: some older Microsoft Outlook configurations may have been silently ignoring SSL/TLS settings for POP3 email connections for years. According to a Fedora community blog post, affected Outlook clients reportedly continued using insecure port 110 connections even when encryption was enabled in the application settings. The issue surfaced after Dovecot 2.4 disabled plaintext authentication on non secure connections by default, causing Outlook users to suddenly lose mailbox access after the Fedora 43 upgrade.

The report suggests the behavior may date back as far as Outl...