A signature block (often abbreviated as signature, sig block, sig file, .sig, dot sig, siggy, or just sig) is a block of text automatically appended at the bottom of an e-mail message. Information usually contained in a signature block includes the poster’s name, phone number and email address, along with other contact details if required, such as URLs for sites owned or favoured by the author.
We can set the signature manually in Setting -> General -> Signature in Goolge account. But if we want to set signature block Automatiically for users then we have to write some code.
Our requirement is that whenever a new user arrives, a script would run and set the default signature for that user and later user can change his signature by himself.
So for this, we will write a script at Admin account of a Google Apps Domain .
So after running this code, signature block of user will be set and user can view it here Setting -> General -> Signature.