validateEmail

This version of validateEmail() looks not only in TLD for MX _records_, also in sub-domains. Its necassary for adresses like someone@uibk.ac.at.

This function takes in an email address (say 'shane@tuna.org' and tests to see if it's a valid email address. 

An array with the results is passed back to the caller. Possible result codes for the array items are: 

Item 0: [true|false] true for valid email address false for NON-valid email address 

Item 1: [SMTP Code] if a valid MX mail server found, then fill this array in with failed SMTP reply codes 

Item 2: [true|false] true for valid mail server found for host/domain false if no valid mail server found 

Item 3: [MX server] if a valid MX host was found and connected to then fill in this item with the MX server hostname

EXAMPLE code for use is at the very end of this function.