Resolved Old Email Clients and Obsidian?

[yabado]

I have several clients that use older email clients to get/send their email. These old email apps still use older SSL protocols like SSL v.2/3 and TLS v.1

If I upgrade to Obsidian, will my clients have issues accessing their emails?

My current setup...

OS: ‪CloudLinux Server 6.10 (Vladimir Lyakhov)‬
Product: Plesk Onyx
Version: 17.8.11 Update #75, last updated on Dec 2, 2019 03:30 AM

TIA

 

[yabado]

Anyone from Plesk care to reply?

 

[IgorG]

Anyone from Plesk care to reply?

Please look at this KB article, it will help Unable to connect to a mail server via an email client: TLS handshaking: SSL_accept() failed