All senior developers should bid: Prevent optout list from receiving future emails

Please note: You need experience of virtualdmin to work on this site as we do not have cpanel. Budget is $40 Please work within my budget and if you are good I have close to a thousands dollar to spend on further developments Task: Our current system is set such that all mail has to go through one door so if the block is set in that door it should stop ALL. This was the setup for more than 8yrs ago. However since we have made several modifications to the site. I want you to verify that this current setup still works IF NOT then fix it to configure all outgoing email notifications to go through a door where it is checked if that email address is currently in our opt out list. If yes then block outgoing notification to that email. 2. Through our admin backend.. You need to create a single field where admin can add or remove an email address from the OPT out list. When admin add an email into the OPT out list, this email never receive any future notification. 3. Change the server password.