- Plesk 11.x for Linux
- Plesk 12.0 for Linux
After configuring port 587, as it is described in the article , the following error appears while sending a test message in Outlook:
Send test e-mail message: None of the authentication methods supported by this client are supported by your server.
The error occurs if encryption type is not specified in mail client.
Change the encryption type from
Open Start menu > Control Panel - All Control Panel Items > Mail (32-bit) > E-mail Accounts on your conputer.
Select your email account from the list and click Change . Email settings should be displayed.
Click More Settings... button.
Select Ougoing Server tab > enable My outgoing server(SMTP) requires authentication and Use same settings as my incoming mail server settings.
Set Outgoing (SMTP) to use port 587 and set "Use the following type of encrypted connection = Auto .
Click OK to update the settings.
Click Next and then, click Finish .
If the issue still persists, connect to the server using SSH
smtpd_tls_security_level = may
and restart postfix.