Working With Yotru
Can I Provide My Own Mailing List?
Yes, and it's a common starting point. A CRM export, a defined account list, or a spreadsheet a sales team already trusts can go straight into a campaign. The main question isn't whether it's allowed, it's whether the list has what's needed to support proper personalization and hit a workable campaign volume.
Practical guide · Published August 22, 2026 · Written by Jeffrey Huis in 't Veld
What a usable list needs
At minimum, a workable list needs accurate company and contact information: real company names, valid mailing addresses, and, if the campaign is targeting specific people rather than a generic title at a company, a recipient name and role. Anything beyond that, industry, company size, a segment or tier label, isn't required but makes the campaign stronger, since those are the fields personalization and message tailoring tend to draw from.
A list doesn't need to be perfectly clean before it's handed over. Some messiness, a few outdated titles, a handful of duplicate records, is normal in any CRM export and gets caught during review rather than being a reason to hold the list back.
How Yotru improves a supplied list
Even a good list usually benefits from a pass of enrichment and validation before it goes to print. Addresses get checked for deliverability, since a piece mailed to a bad address is a wasted piece regardless of how good the creative is. Where personalization depends on fields the original list doesn't have, current job title, company details, relevant imagery sourcing, that data can often be filled in rather than leaving those fields blank or falling back to something generic.
This isn't about replacing a customer's list logic. It's about making sure the list that already reflects real sales priorities also has what the production side needs to do its job well.
When your list is ready as-is
A list is generally ready to go when it has current, verified contact and address data, when it's large enough to support a proper campaign run rather than a handful of test pieces, and when it already carries the fields the intended personalization needs, company name at minimum, role or industry if the message is meant to vary by either. If that's the state of the list, the review step is mostly a formality rather than a real gap-filling exercise.
When it needs supplementing
Two situations come up most often. The first is volume: a list built for a narrow sales motion, say a target account list of a few dozen strategic accounts, may not be large enough to run as a standalone campaign at proper scale. In that case it can be run as its own tier, or expanded using similar criteria to reach a workable volume. The second is incompleteness: a list with company names and mailing addresses but no role-level detail can still be mailed, but it limits how far recipient-level personalization can go until that detail is filled in.
Keeping your own targeting logic
One advantage of a customer-supplied list is that it often reflects knowledge a data match alone wouldn't capture, accounts already in an active sales cycle, companies flagged by a rep for a specific reason, relationships with history behind them. That kind of targeting logic is worth preserving rather than discarding in favor of a purely criteria-based list. Where a supplied list needs expanding to hit volume, matching new records against the same underlying logic, not just the same industry and size filters, keeps the campaign consistent with why the original list was built the way it was.
Frequently asked questions
No particular format is required. A standard spreadsheet or CRM export with company and contact fields is usually enough to start from; formatting gets sorted out during review.
That's workable. The campaign can target a role or title generically at each company rather than a named individual, though named personalization goes further when it's available.
Records with undeliverable addresses or clear duplicates typically get flagged during validation, but decisions about which accounts to include stay with the customer.
Yes. A supplied list can be run alongside additional accounts matched to the same targeting criteria, which is a common way to bring a narrow list up to a workable volume.
It can be supplemented against similar criteria to reach a proper campaign volume, or run as a smaller, higher-touch tier alongside a broader campaign, depending on what the list represents.
Related topics
Work with Yotru
Working with the list you already have
Yotru reviews a supplied list for deliverability and completeness rather than replacing it, and fills in the fields personalization needs when they're missing. A customer's own targeting logic, sales priorities and account history stay intact through that process. .