Ishan, after reviewing the code, help documentation, and speaking with the development and communication teams, the footer is behaving as expected.  The footer feature was first introduced in SmarterMail 8 and appended the footer to all incoming AND outgoing messages.  The same basic code is still implemented in the latest versions of SmarterMail.  We are going to update the help documentation to ensure that it reads both incoming and outgoing messages.

However, we have also added a feature request / discussion item for possible future implementation to introduce a new setting that would allow the user / admin to specify whether the footer is applied to incoming, outgoing, or both messages.