Thanks for the feature request!!! This will be a nice feature which will enhance Mass Stay in Touch of Massmailer.
I will keep you posted once this will gets implemented.
Mansa Support Team
I have used your Mass Stay In Touch of MassMailer and I am pretty much comfortable with this feature. You guys did an excellent job in order to build this functionality which is nearby similar to Salesforce Mass Stay In Touch minus Salesforce Mass Stay In touch Limitations. Here I would like to ask you guys, can we increase the character limit in Body Section that is above the signature field?