A clean contact list is the foundation of effective email marketing. Importing contacts with explicit permission, accurate segmentation, and recent engagement protects your sender reputation, keeps your emails out of spam folders, and ensures your marketing reaches people who actually want to hear from you. Use the requirements below as a guide before importing any contact list.

This article covers the four requirements for importing a contact list: explicit permission, setting and meeting expectations, active and engaged contacts, and segmentation. For a full overview of email compliance and best practices, see the Email Compliance Handbook and the Email Deliverability Guide.

Explicit Permission

Every contact on your import list must have explicitly opted in to receive email marketing from your business. Explicit permission means the contact took a direct action to subscribe — such as completing a web form, checking an opt-in box at checkout, or responding to a direct invitation. Contacts added without explicit permission are at high risk of generating spam complaints and unsubscribes, which damages your sender reputation.

The following lead sources are prohibited and cannot be imported as marketable contacts:

• Purchased or rented lists
• Joint venture or affiliate lists
• Chamber of commerce lists
• Membership or organization lists
• Business partner lists

If you need to import contacts who have not given marketing permission — for example, customers who have purchased products but have not opted in to marketing emails — select No when prompted with the question "Do you have permission to send marketing emails to these contacts?" during the import process. Contacts imported with this selection will be assigned a status of nonmarketable and will not receive any email marketing. Their account information can still be managed in your CRM.

Set and Meet Expectations

Obtaining permission is the first step — but permission alone is not enough. Contacts must also know what type of content they are signing up for and how often they will hear from you. If a contact signs up through a lead magnet offering a free eBook, they are not expecting to receive a weekly newsletter. Sending content or at a frequency that does not match what was promised increases the likelihood of spam complaints and unsubscribes, even from contacts who genuinely opted in.

Before importing, confirm that the opt-in mechanism used for each list segment clearly described the content type and sending frequency the contact agreed to receive. Only import contacts into sequences or tags that match what they signed up for.

Active and Engaged Contacts

Before importing, remove contacts who have not engaged with your marketing recently. An unengaged contact is one who has not opened, clicked, or otherwise responded to your emails over an extended period — typically six months to one year depending on your sending frequency. Importing old or unengaged lists puts your sender reputation at risk by increasing exposure to spam traps, spam complaints, and email blacklists.

A spam trap is an email address used by internet service providers and anti-spam organizations to identify senders who are not maintaining clean lists. Hitting a spam trap can result in your emails being blocked or filtered for all recipients, not just the trapped address. After importing, perform regular list hygiene to remove contacts who become inactive over time. Keeping your active list engaged is an ongoing process, not a one-time import task.

Segmentation

Not all contacts on your list should receive the same emails. Before importing, identify the different groups within your list and plan how to segment them so each contact receives content relevant to their relationship with your business. Contacts who are unengaged, previously unsubscribed, or have hard bounced must be separated from active subscribers — importing them together without segmentation risks sending to contacts who should not receive marketing emails.

When exporting contacts from another system to import into your CRM, export each contact's current email status alongside their email address. Email status tells you whether a contact is marketable, unsubscribed, or bounced, so you can import each group correctly. Add relevant tags during the import process to distinguish between segments — for example, tagging contacts interested in a monthly newsletter separately from contacts who only want quarterly product updates. Accurate tagging at import ensures your automations and broadcasts target the right audience from the start.

Preventing Risks After Import

Importing a clean list is the starting point — maintaining it over time is what protects your long-term email deliverability. After importing, follow email marketing best practices on an ongoing basis to prevent spam complaints, spam trap hits, and blacklisting. Perform list hygiene regularly based on your sending frequency. Contacts who stop engaging should be removed or suppressed before they become a deliverability risk.

For detailed guidance on maintaining a healthy sender reputation and improving email deliverability, see the Email Compliance Handbook and the Email Deliverability Guide.