I'd like to use a C# program to poll a gmail account and automatically download new messages. I know you can use gmail as an outbound SMTP server, but is there any way to access new messages sent to the account?
EDIT: Thanks for the rapid feedback....so I have two options, POP or IMAP.
Which one should I use? And why?
EDIT #2: Looks like IMAP allows me to not have to poll. Looks like the way to go.
Use Gmail with IMAP.
You can get an Atom Feed of your GMAIL, which can be fetched with a regular web request, and parse as a regular XML document. I made a PHP page I could access from my phone (which doesn't support Atom Feeds, or pages as advanced as Google Mobile), to show me a list of new emails.
来源：https://stackoverflow.com/questions/342106/programmatically-use-gmail-to-receive-e-mail