You deleted the message from the electronic mailbox, and then it was required to you again. It is possible to restore it not always, but it is worth trying. There are several ways allowing to carry out its recovery.
Instruction
1. Come into the electronic mailbox via the web interface then pass into the folder under the name "Remote" ("Basket"). If you did not configure automatic cleaning of this folder at an output or did not delete the letter from there, you will find it there. Remember that in Mail.Ru service the automatic cleaning of a trash folder at an output is by default included, and in a number of services from it messages which are moved to it too long ago (how long ago automatically are removed, depends on service).
2. If for viewing contents of an electronic mailbox you use not the web interface, but an email client, look how it is configured. Perhaps, after creation of the local copy of messages on the computer it deletes them from a box. If you use an email client as at home, and at work and at least on one computer it is configured thus, try to start it on all computers which you use - perhaps, you will find the letter which is absent in a mailbox, at least on one of them. Also such script is possible: you use both ways for access to a mailbox, and deleted the letter via the web interface. If before it you downloaded it an email client, then irrespective of its settings, you have its local copy. There is also a reverse situation: the email client is configured so that not to delete the downloaded letters from the server, and you deleted one of them of the local folder. In this case look for it on the server.
3. At last, if it turns out that you is guaranteed deleted the message both from the server, and from an email client, try to find at least attachment. If you downloaded the files attached in the message on the computer, remember in what folder you saved them.
4. At last, if to find the letter or attachment it was not possible neither on the server, nor in a cache of an email client, nor on computer disks, there is always one more option: ask the person which sent you the message, send it once again.