====== getEMail ======
Returns the text of the letter in accordance with the specified parameters.
===== Syntax =====
<code javascript>getEMail = function(aHost, aUser, aPassword,
  aContains, aDelete, aIndex);</code>
==== Parameters ====
  * **//aHost//** 
    * //functions:// pop3 mail server address
  * **//aUser//** 
    * //functions:// user name
  * **//aPassword//** 
    * //functions:// user password
  * **//aContains//** 
    * //functions:// text included in the body or subject of the letter
  * **//aDelete//** 
    * //functions:// flag indicating whether to delete a letter
  * **//aIndex//** 
    * //functions:// index of the received letter from found
==== Returned value ====
  * //functions:// text of the received letter

===== Examples =====
  -<code javascript>//Получаем первое письмо, содержащее waspace test и удаляем его
var emailtext = getEMail('smtp.mail.ru','user','pass','waspace test',true,0);</code>