How do I assign a keyword for each query, and do I have to use a keyword?

The situation is different for different messaging applications.

Instant messaging and GSM Modem require a keyword to be used. The reason for this there can be only one instance of each running on a computer so query requests must be distinguished by a unique keyword.

Email and SMPP can have either of the following:

1. A unique email address/SMPP mobile number for each query
2. Use one email address/SMPP mobile number for all queries but separate each query by a unique keyword

So, as a rule the following apply for using with or without keywords.

A unique email address for each query, or an email address with a unique keyword for each query.

A unique mobile number for each query with SMPP, or a mobile number with a unique keyword for each query with SMPP.

A mobile number with a unique keyword for each query with a GSM Modem

An instant messaging ID with a unique keyword for each query with each instant messaging provider.