If you have to send emails that have a certain pattern to be followed, then you can save them as templates.
Eg. You have to send an invitation mail to your friends.
First fill in a subject line ‘You are invited to my party’
Write out the details: Dear _____,
We are having a party at my place, sharp 7.30. Be there on time. The gang is coming too!!
Regards
Buddy
Go to ‘Save Mail As’ > ‘Templates’. The mail gets saved as a template with the chosen subject line.
Now whenever you want to write an invitation, simply click on ‘Templates’ and choose the template.
Add the name as per requirement. Time saved!