For cancelling an e-ticket, you need to login to your irctc account and complete a lengthy cancellation process.
This is tiring as the website is usually very busy and webpages take long time to load.
But there is an absolutely easy way of doing the same. Its by directly sending an email to firstname.lastname@example.org from registered email address(one that’s in irctc profile).
For cancelling an e-ticket, one just needs to write e-ticket’s PNR number, information regarding the issue, and send it to email@example.com.
Attaching a copy of e-ticket is better but its not mandatory.
On successful cancellation of e-ticket, an acknowledgement email is then sent back informing the user about it.