MS Access Coded program

We use a boutique piece of software initially designed in the mid-1990s and last updated in 2008. It is a pretty simple task management program for building and managing the day-to-day scheduling of new home builds. It repeats the Who, what, where, When, and notes that are 99% the same across each new build.

Currently, we are looking to modify the email syntex code to authenticate on an email server to send the work ticket by email. It had worked for 12 years and recently stopped when our ISP updated their mail servers. The successful handshake connection does not send the ESMPT AUTH command to return an EHLO exchange. So the exchange is slipping into HELO and not requesting the AUTH to get the user name and password for the "My Server Requires Authentication" tic box.

I feel the coding has been flattened when the per licenses were sold. We did receive full rights to own, modify and change and Copyright the revision as we were Beta Testers for the software.