We had a postfix patch on our mail servers which allowed rotated sending IPs from a pool of IPs.
Postix was upgraded and overwrote the patch. We still have a server with the custom patch.
What I need is for somebody to compare the postfix installations and re-install the custom patch on the servers which had the patch overwritten (3 of them).
I need this done quick and inexpensively. If you do a good job, you'll likely get more work from me as I always need good programmers.