Is there any way to add Send & Delete button in GMail like Send & Archive which can be enabled in labs. any add-ons, extensions or greasemonkey script will do.
Send & Delete in GMail
gmail;delete
There's nothing in Labs to do this at this time.Depending on what you're after, you might be able to get close using filters. Create a filter that looks for a particular string in the content (Contains:). Make the string something innocuous that no one would ever think to put in a message (something like ///d\\\). Then set your filter to delete any such message.When you send a message with that string in it the message will get labelled Trash (as if you'd deleted it yourself).Two possible complicationsIf the recipient replies and quotes your tag the message will go straight to Trash. If they don't it won'tIf you use this to reply to a message, the reply will go to Trash, but the original won't. It doesn't delete the whole threadDepending on what you're trying to accomplish these may or may not be a problem.