Can you read deleted emails on a computer?

If you have closed the page on which you were browsing then it is impossible for u to read the deleted mail. Other wise you can read it by going back on the previous page.

With most email programs, deleting an email moves the message from the current folder into a folder designated for deleted emails. The folder is usually named "trash" or "garbage". Normally, you can come back later, access/read the message and move it out of the trash folder. Messages in the trash folder are retained until a threshold is reached such as a retention time or maximum email count and then are purged from the trash folder.