Hi @TechWishes
Welcome to the Shopify Community and thank you for sharing your question with us here. I really like this question, I can see how this could be very beneficial, especially for a store with a lot of incoming customer emails. While I am not a developer myself I did touch base with our theme support team to see what they would suggest in this case.
TLDR: Yes, this can be done by hardcoding the specific email addresses into the custom form (or using an app to create the custom field for you) but it is not recommended.
The reason we don’t recommend this as a solution for your email forwarding needs is because this method leaves your various emails open to scraping, which can lead to a lot of incoming spam flooding your inboxes and making it difficult to support your actual customers.
@Jason suggestion about email forwarding based on keywords is also what our theme support team suggested. They recommended adding a custom field to create a TOPIC for the email that can then be setup for email forwarding to your preferred email accounts. Many online email services provide this kind of feature at no cost to you. You can reach out to your email host or check their own Help Center to see what email forwarding options are available.
If you are using a free Shopify theme you may be eligible for design support time from our theme support. If you are, you can contact our Live Support to create a ticket and they can escalate your request to our theme support team to review. I can’t guarantee that this will be supported, but it’s definitely worth considering!
If you have any other questions we can help with please let us know.
-Shay