Usually, the person or agency you’re expecting a mail from will have a “do-not-block” email address mentioned on their website, which you may add into your spam filter as an allowed address.
This is how it works with university admissions mails.
Hi, thanks. The problem is that I send the message to their email address #1, and my spam program therefore recognizes #1. Unbeknownst to me, they have #1 set up to forward to #2, and I don’t know about #2. So, when they reply from #2, my spam filter catches it.
Is there a way they can reply from #2, but make it look like it came from #1, without action on my part? Thanks.