There are several reasons I may not respond.
1. I may not think or realize it requires a reply (for most feedback, suggestions, etc.).
2. It may have ended up in the spam box and was cleared before I got to check on it
3. It appears to be spam (advertising, solicitations, nonsense, etc.). Those will never receive responses.
4. It never reached me at all. This could mean something has glitched on my site or your end, and I hadn’t realized it was happening. In such cases, contact me through my Facebook Page or other platforms that I’m connected with. If I find that is the case, I will try to fix the problem as quickly as possible.
If your contact was legit, I apologize. Right now certain domains are not even looked at and/or are auto-deleted and for good reasons.
The only option in those cases is to contact another more reputable source. Also lately, I only check my mail for this site maybe 1-5 times a month, so it might be a bit before I get to it anyway.