To access webmail from Plesk control panel, perform the following steps:
1 - Logged in to Plesk, https://your domain name:8443 .
2 - Go to Mail.
3 - In the list of email addresses, click the letter Icon corresponding to the email address you need.
4 - A new browser window will show, enter your full email address as the username, and enter the email address password.
5 - Click on Login.
