How to disable QA_Support@salesforce.com or Support@salesforce.com in the from address!

Hi,

I have a requirement where we have to disable any salesforce related labels in the outgoing mails. Now one issue we are coming across is when we change a user's username or password, Salesforce sends mail to the admin from Support@salesforce.com or QA_Support@salesforce.com. Now we don't mind Support tag but is there any way to remove @salesforce.com tag and the footer Salesforce Team?
I have managed to remove no-reply@salesforce.com from the from address.

Any suggestion would be really helpful.

Thanks,