Email deliverability basics for marketing managers who don't own the DNS

You don't need DNS access to be responsible for this

Deliverability is often framed as a technical problem that belongs to IT, which leaves marketing teams unable to act on it even when they're the ones who notice open rates dropping first. Most of what actually needs attention day-to-day sits inside your sending platform, not in DNS - list management, content, sending cadence, and engagement monitoring. The DNS-level pieces need to be set up correctly once and checked occasionally, not managed daily.

The checklist to hand your technical team, once

Ask whoever controls your domain's DNS to confirm these three records exist and are correctly configured for your sending domain:

• SPF - a TXT record listing which servers are authorised to send mail as your domain.
• DKIM - a cryptographic signature added to outgoing mail, verified against a public key published in DNS.
• DMARC - a policy record telling receiving mail servers what to do when SPF or DKIM checks fail.

This is a one-time setup conversation (with occasional checks after any change of sending platform), not an ongoing task you need DNS access for.

What you can and should own yourself

Recognising when a problem is actually DNS-level

Most day-to-day deliverability dips are content or list-hygiene issues you can fix yourself. A few signs point specifically to an authentication problem that needs your technical team:

• A sudden, sharp drop in delivery across all recipients at a single provider, rather than a gradual decline.
• Bounce messages that reference authentication failure, SPF, or DKIM directly rather than a full or invalid mailbox.
• The issue started right after a platform migration, a new sending tool was added, or DNS records were touched for an unrelated reason (a new subdomain, a website migration).

In any of these cases, escalate with the specific symptom and timing rather than a general "deliverability is bad" - "placement dropped sharply at Outlook starting the 14th, right after we added the new sending tool" gives your technical team something to actually investigate.

Build the relationship before you need it

The worst time to have your first real conversation with IT or development about email infrastructure is during an active deliverability crisis, when both sides are under pressure and neither has much patience for explaining basics. Set up a short, low-stakes conversation early - before anything is broken - to confirm who owns DNS access, how long a record change typically takes to propagate and get verified, and what the escalation path looks like if you spot something urgent outside normal working hours.

This upfront relationship-building pays off directly the first time you do need to escalate a real problem: you already know who to contact, they already have context on what your sending program looks like, and you can describe the symptom in terms that map directly onto something they can check, rather than starting from zero during an active incident. Keep a simple shared log of past escalations and their resolutions - what the symptom was, what it turned out to be, and how long the fix took. Over time this becomes a reference that speeds up diagnosis for both sides, since a similar symptom showing up again can often be traced back to a documented prior cause rather than starting the investigation from scratch. Make this log easy to search by symptom rather than by date, since the person searching it during a future incident will usually remember what went wrong, not when it happened. Treat a quiet quarter with no escalations as a reasonable sign the setup is stable, not as evidence the log is no longer needed, since the next real incident is still worth being able to search against something concrete.

What not to do

Do not accept "it's a DNS thing, not my problem" as a reason to stop monitoring - you're usually the first to notice the symptom even if someone else fixes the cause. Do not ask for DNS changes speculatively "just in case" without a specific reason; unnecessary record changes risk breaking something that was working. Do not assume every deliverability dip is authentication-related - most aren't, and chasing a DNS fix for a list-hygiene problem wastes time on both sides.

MailPilot handles mailbox-level warm-up and reputation tracking without requiring DNS access for day-to-day use, and its dashboard surfaces the specific symptom - bounce, complaint, placement by provider - so you have the detail to bring to a technical conversation when one is actually needed.