Adding Domainkeys/DKIM to Email Sending Engine File

[PaulReed]

I have an email software program that runs in Linux.

The main email sending engine is a small file that is compiled and built like this...

# CXXFLAGS="-O3 -fomit-frame-pointer -DHOSTNAME_CHECK='\"mydomain.net\"' -DWEBDOMAIN='\"mydomain.net\"' -DMAILDOMAIN='\"mydomain.net\"'" ./configure --with-mysql=/usr/mysql

I don't know anything at all about the C++ language. What I want to accomplish is these two things.

1) Add Domainkeys/DKIM to be written in the header of the mail, (The easy part I can do by adding the TXT string to my DNS).

2) Make a simple text change in this C++ file... text that ends up at the bottom of the email message.

I'm looking to contract this to someone, because I do not expect someone to walk me through this.

Thanks,
PaulReed