SMTP configuration

SMTP configuration, Connection unsuccessful

Steps to reproduce
Mattermost Version: 9.4.1
Database Schema Version: 117
Build Number: 7424719315
Database: postgres

Expected behavior
i set SMTP but test response is as below:

Connection unsuccessful: Connection unsuccessful: unable to connect to the SMTP server: invalid response code: +OK Welcome to MailEnable POP3 Server

i use outlook app with same setting and everything work well.

Observed behavior
i can see telnet on VM of Mattermost and connect to mail server

Your SMTP server is identifying as a POP3 server? What port are you connecting to?