Issues receiving emails or nothing showing up in my inbox
1. Check the “All Mail” label, "Trash", and "Spam" for the missing messages.
2. Look in Settings > Filters and Blocked Addresses > Is there anything defined?
3. Look in Settings > Forwarding and POP/IMAP > Is there anything defined under Forwarding?else)? What about “Spam” (but not “Junk” or anything else)
4. Worse case try removing the email account completely from your device then re-entering your email account back on your device