Today the php mail function is returning bool(false), meaning not accepted for delivery.
---------- Post added at 09:05 PM ---------- Previous post was at 02:20 PM ----------
The php mail function is returning bool(true) now. However, there is still no mail received. I tried an additional test:
1. Using cPanel created new email account for previously configured sub-domain.
2. Logged into this email account using cPanel Webmail (roundcube) and sent test email to recipients at various domains.
None of the recipients receive the test email. What do you think?