==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):  1.7.1
- Deployed with iRedMail Easy or the downloadable installer?
- Linux/BSD distribution name and version: Debian 12
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? YES
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Hi!
Recently the server was changed to the latest version of Debian and iReadmail, this caused some workstations with Windows 7 and Office 2016 to stop connecting, giving an encryption error, I tried connecting via IMAP, POP3, IMAP and POP3 SSL, TLS, automatic and it doesn't connect. Could it be an incompatibility because Windows and Office are so old?