Checks if exits a user with specified email address.
Command's fields description:
txtUser1 field is not used for this command.
txtUser2 field is not used for this command.
txtCommand field contains the command: “usercheckmail”.
txtFormat optional field specifies txtParameters and response formats. more info.
txtParameter field contains a structure like this:
<?xml version="1.0" encoding="utf-8" ?>
<mail> mandatory. E-mail address to check.
<time> mandatory, date and time in UTC. The accepted format is “yyyyMMddhhmmss”.
txtProvider field must contain the application calling ID and generated characters.
txtSignature field must contain the signature based on the string made of “Command Name” + “mail” + “time” + “generated character to 32”.
Looking at the previous example, the string on which calculate the check will be:
Therefore the txtProvider field will be: