What information can I include in emails?

See Designing Emails.

I'm not sure if I sent an email. How can I check?

See Manage Emails

I want to stop the automatic emails going out while I update some submissions. How do I do that?

See Disabling automatic emails.

Can I send emails out to just a few people - or even just one?

Yes - See Viewing, Editing and Sending Emails.

I want to be informed when abstracts are submitted. How do I do this?

You can BCC emails to the event admin. See Designing Emails - Additional Settings.