Deliverability is whether your email arrives in the primary inbox. Creative and offers do not matter if the message never gets seen.
Your corporate domain carries payroll, customer support and executive email. Cold volume belongs on separate sending domains and inboxes you can afford to manage carefully. That protects the reputation of the address your customers already trust.
SPF, DKIM and DMARC should be correct before you send anything. Many “spam problems” are misconfigured records. Have someone who understands DNS check them — guessing breaks more than it fixes.
New inboxes need gradual volume so mailbox providers learn to trust them. Jumping to thousands of cold sends on day one is a common way to land in spam. Warm-up tools help, but they do not excuse bad lists or spammy copy.
If placement slips, stop sending, fix list hygiene and copy, and recover before you scale again. Related: how to evaluate a cold email agency.
About the author. Written by the Masi Digital team. Questions: joe@masidigital.co.