Click on File.

Click on Add Account.

Select Manual setup or additional server types. Click Next.

Select POP or IMAP. Click Next.

Fill in the blanks with your own account information.
Make sure the Account Type is POP3.
If your domain is xyz.com, enter the incoming and outgoing mail server as “mail.xyz.com”. The example in the image is “mail.mydomain.com”.
Make sure User Name is your full email address, e.g. johndoe@xyz.com. The example in the image is “johndoe@mydomain.com”.

Click on More Settings …
At the General tab, change the Mail Account to your email address, e.g. johndoe@mydomain.com. Add “(POP3)” behind as shown above to indicate the account type if you want.
If you want your recipients to reply to a different address, e.g. johndoe@yahoo.com, fill it in the “Reply Email” blank. Otherwise, leave it empty so that it will default to your email address, i.e. johndoe@mydomain.com.

Click on Outgoing Server tab.
Tick “My outgoing server (SMTP) requires authentication”.
Select “Use same settings as my incoming mail server”.

Click on Advanced tab.
You can tick “Leave a copy of messages on the server” if you have more than one device doing the download of emails.
Make sure to tick “Remove from server after _ days” so that your mailbox will not become full.
5 is set in the example above. 3 to 7 is a good number depending on your daily email volume.

If you travel overseas, some Internet Service Providers (ISPs) or Hotel WiFis block port 25. Thus, you may have to change the “Outgoing server (SMTP)” from 25 to 587.

There is no need to change the value back when you return to Singapore. Both 25 and 587 can be used with all ISPs within Singapore unless the network adminstrator of the premise blocks it.
Click OK.
You will see “Test Account Settings” window.
When completed, click Close.

Click Finish.

Done!
You can start downloading and sending emails.