Instant email alerts and notifications
45238
Instant e-mail notifications of answers to questions
19060
Subscribe to a particular question by email (not RSS)
102779
How can I send a custom desktop notification?
77636
How to send HTML/CSS emails?
155809
adding form to html email newsletter
126376
How do I set up Outlook to send a auto reply during a certain hour of the day every day?
29293
Gmail filters/labels: Force email to stay in Inbox?
36794
Customize Notification Alerts/Badges
146196
Notify more frequently than once a day?
6174
How to check if an email address exists without sending an email?
66208
Configure unattended upgrades notification e-mail's from address
14917
How to make my server email me when there are security updates?
143919
Email confirmation on registration
49827
How to disable notifications for a single mailbox in Mail?
70202
Sending emails with Javascript
40901
Internet & Email Sharing
153659
Not getting email alerts on answers on Stack Overflow