Deliverability
Hard vs soft bounces, and why you must suppress hard ones
A hard bounce (5xx) means the address does not exist — suppress it immediately and never send again. A soft bounce (4xx) is temporary — retry with backoff.
Repeatedly hitting dead addresses is a top reputation killer and a fast route onto a blocklist. BookMySpot auto-suppresses hard bounces and complaints so you cannot re-send to them.
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Get started DKIM signing, SPF alignment and DMARC are set up the moment you verify a domain.