1. Email didn’t arrive in his inbox of his Google workspace

2. He checked workspace email logs (with admin you can do this on gsuite)

3. It showed the intentional non-accept

4. Comprehending the problem, he switched to personal Gmail

5. The email arrived

6. He informed the sender of the original problem which he worked around

7. Sender is tech-illiterate and did not realize what the problem is. This is common with first line customer support so that happens.

The question to ask is whether you are literate in English or you skimmed too fast. Because I did a 30 s read of the article and got that.