Is reverse DNS optional for bulk senders?

Myth: Reverse DNS is an advanced configuration that bulk senders can skip.

Reality: PTR records are table stakes for bulk sending.

Receiver behavior:

Many check PTR before accepting mail

Missing PTR = immediate rejection or heavy penalty

Generic PTR = strong spam indicator

What is required:

PTR record exists for sending IP

Meaningful hostname (not IP-based or generic)

FCrDNS passes (forward and reverse match)

No exceptions:

Bulk senders especially scrutinized

Cannot compensate with good content or engagement

Infrastructure requirement, not optional enhancement

Ship registration is mandatory for commercial vessels. No proper papers, no entry to commercial ports.