Hi, @sysadmintf
Based on the error that we see in the log, the SendPasswordReset command is complaining about the failure to open TLS connection. While I can reach out to your instance via 443:
Ahmad-Danials-MacBook-Pro:~ ahmaddanialmohammad$ echo | telnet 34.106.151.214 443
Trying 34.106.151.214...
Connected to 214.151.106.34.bc.googleusercontent.com.
Escape character is '^]'.
Connection closed by foreign host.
Can the Mattermost instance reach out to the email server you configured? You can run a ping and telnet test to see if it can talk to each other:
echo | telnet <mail_server> <ip_address>
Can you please share the settings of your instance with the sensitive information redacted such as password so I understand the web server and SMTP configuration better?
cat /opt/mattermost/config/config.json | grep -A91 "ServiceSettings"
cat /opt/mattermost/config/config.json | grep -A30 "EmailSettings"