It's your job to advice them to use the proper solution. But the customer ultimately pays you, so if they really want an email monitoring solution, you should b

It's your job to advice them to use the proper solution. But the customer ultimately pays you, so if they really want an email monitoring solution, you should built it for them. Also, the cost savings by automating the task should outweigh the monthly cost of the tools that are required to run it. If not, the task is probably not worth automating.