Maybe you can automatically forward mails from that domain to Gmail and find a way to label them.
At worst you can write a mail client to do that by logging in, listing mails, mailing them to you and keeping track of what it already sent (sqlite?) They are very well known protocols with plenty of implementations, so probably a LLM can write the code with not much guidance.
At worst you can write a mail client to do that by logging in, listing mails, mailing them to you and keeping track of what it already sent (sqlite?) They are very well known protocols with plenty of implementations, so probably a LLM can write the code with not much guidance.