How to send an email after query submit

i developed a new plugin called webgeek (http://geek.lk/webgeek)
members can add his websites and blogs in this programe. when submit it i want to send an email to member. could you please give me any example or suggest me a plugin for study about sending mails
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Comments
Check out EMailSubscribe. It has some code in it for sending emails in Vanilla through a plugin.
Add Pages to Vanilla with the Basic Pages app