H 10 doesn't send emails.

[Fred2004]

When I type an outgoing message, the computer won't send it. Instead, it merely ends up in the Outbox.

[Huffer]

But it receives? Then it is a problem with the email settings...outgoing server or server authentication settings. 

Or you still occasionally find networks that block some outgoing email ports. You may have to use a different port for outgoing email.