Be forewarned, I have no access to a 3300, everything I put here is un-tested, but if it (The 3300) is capable of SSL/TLS, and SHA-2 encryption, then the following should work.
Install the latest firmware.
smtp.gmail.com , use port 587 with STARTTLS (preferred if its an option) or 587 with TLS, lastly, SSL on port 465 if that's all you can put in.
login name is the full email address.
If the above can't be done, you can use the unauthenticated server aspmx.l.google.com with port 25, no login required, BUT you can only send to an email address hosted by gmail's SMTP service.
Lastly, go third party and use a relay. SMTP2Go is the most common.