To use ebase email functions to send/retrieve mail from a GMail account, the email account settings need to be set as outlined in the following FAQ page for the SMTPit plug-in.  (ebase uses the SMTPit Pro email plug in from CNS to provide email functionality):

http://www.cnsplug-ins.com/faq.htm?product=SMTPit

During development, we found it particularly important to pay attention to the settings of "Outgoing TlsSslType" and "outgoing port".  You must use one of the following pairs of settings:

• port 465 with "BeforeConnection"
• port 587 with "AfterConnection"