Here are the basic settings you need to enter into your e-Mail client to be able to send and receive emails:
POP3 or IMAP are supported
Your username is your FULL email address.
TLS is required
Authentication is required
Your SMTP port MUST be 587
Each individual mail client will have online help files available which will direct you in the right direction.
Lastly, if you are still experiencing difficulties, check that it's not your virus filter causing issues. You may need to temporarily disable it to confirm if it is, indeed, the cause of any issues.
We have more explicit configuration guides for many popular e-Mail clients available on this site. However, if you require guided help, assistance is available at our current support rates.