Managing Deliverability Across a Dozen Client Domains

Each client domain the agency sends from carries its own reputation, its own DNS configuration, and its own history of what's already been sent, which means a clean process on one account doesn't guarantee a clean one on the next. An agency that treats deliverability setup as a one-time task during onboarding, rather than an ongoing practice per account, ends up finding problems only when a client complains that a campaign underperformed.

A repeatable onboarding checklist, run the same way for every new client domain, catches most problems before a campaign ever launches: SPF, DKIM, and DMARC configured correctly, a proper warm-up period before real volume, and a seed test confirming placement before the client's first live send. Agencies that skip this because a new client is eager to launch quickly tend to be the ones explaining a spam-folder problem a few weeks later instead.

Run this sequence for every new client domain:

1. Configure SPF, DKIM and DMARC correctly on the client's sending domain before anything goes out.
2. Run a proper warm-up period before any real sending volume begins.
3. Run a seed test to confirm placement before the client's first live send goes out.
4. Connect the domain to Mailreach so the account manager sees its placement alongside the agency's other client domains.

Connecting every active client domain to Mailreach gives an account manager a single dashboard instead of a dozen separate logins, which matters when the agency is juggling several campaigns at different stages of warm-up and volume. Its per-provider breakdown also helps triage: a domain landing fine on Google but poorly on Microsoft points at a specific, fixable configuration issue rather than a broad reputation problem.

If a client reports their campaign's replies have dried up and a seed test confirms spam placement, that's the moment to bring in InboxAlly rather than trying to quietly ride out the recovery with continued sending. Clients notice when results drop, and being proactive about naming the problem and the fix builds more trust than waiting for them to ask what happened.

Setting expectations during onboarding, that deliverability is actively monitored and that a flagged domain gets a defined recovery process, positions the agency as handling a known risk rather than something that only comes up when it goes wrong. Clients who understand the process in advance react very differently to a placement problem than clients hearing about deliverability for the first time mid-crisis.

The agency's own prospecting outreach, used to win new clients, should run on its own domain entirely separate from any client's sending infrastructure. Mixing the two means a mistake in the agency's own pipeline could theoretically affect a client account, and there's no good reason to accept that risk when keeping them apart costs nothing beyond a second domain.

Most agencies report open rates and reply rates to clients as a matter of course, but placement data rarely makes it into the same report, even though it's arguably more diagnostic when a campaign underperforms. Adding a placement summary to the standard client report, even just a line noting whether the sending domain stayed in good standing that period, turns deliverability from an invisible background concern into something the client can see is being actively managed.

This also protects the agency: when a campaign underperforms for reasons entirely outside deliverability, such as a weak offer or the wrong target list, having placement data on hand to show the domain was clean the whole time redirects the conversation toward the actual cause instead of leaving deliverability as an unexamined suspect. Clients respond better to that kind of transparency than to a report that only shows the numbers without any context for why they landed where they did.

It's a small addition to an existing reporting process, but it changes the tone of a difficult conversation about underperformance from defensive to informative, which matters for client retention over a long engagement, especially with a client already inclined to wonder whether the agency's work is the problem. Agencies that build this habit into every monthly report, rather than only mentioning deliverability when something has gone visibly wrong, find clients raise fewer of these questions in the first place, since the ongoing visibility does the reassuring work before a bad month ever happens.