Yes! SMTPit Pro and MMEmail can send email through Gmail, Google Mail, or Google Apps. The settings below will allow you to work with your account.

Host: smtp.gmail.com
From Address: your full email address (username@gmail.com or username@your_domain.com)
Authentication Type: Login
Username: your full email address (username@gmail.com or username@your_domain.com)
Password: your Gmail password

Port: 465
TLS/SSL Type: BeforeConnect
OR
Port: 587
TLS/SSL Type: AfterConnect

Note: For the Port and SSL settings, use either Port 465 and BeforeConnect OR Port 587 and AfterConnect. Other combinations of the settings will not work.