If you start to use the email client Opera Mail and no email account is set up in Opera Mail, the dialog of adding a new account is displayed (img. 3).
If you want to add another email account, go to the menu Tools > Mail Accounts...

In the window Manage Accounts, click on Add...

Select the kind of account Email and click on Next:

Enter your Real name, as shown others, and your Email address. Organization is optional. Click on Next.

Enter the Login name - your whole email address, password and choose an email account type - POP3 (emails will be saved into your PC). Click on Next.

Incoming server - POP3 - is pop3.forpsi.com, the name of Outgoing server  - SMTP - is smtp.forpsi.com. You can set "Leave messages on server", if this option is not checked, emails are deleted from the server after recieving them into email client. If you want to leave messages on server, you have to regurarly check your mailbox (in webmail.forpsi.com) whether it is not full.

Click on Finish, email account will be created.

Now, the email client is ready to use. The email account can be edited later.

Note: Internet service providers often disable communication on the port 25 to prevent spamming from PCs with virus. To prevent trouble with the disabled port 25, we recommend to use the port 587 or the port 465 along with an encrypted connection (SSL) for the SMTP server.
Edit your email account - go to the menu Tools > Email Accounts. Then select your email account and click on Edit...

Click on the tab Servers and fill in 587 into the field Port number of outgoing SMTP server.