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Upload your contacts to ModularMail

Add your patient list from a CSV file, or paste in email addresses. Takes about two minutes.

Checked 16 October 2026

Before you start
  • A CSV file of your contacts with a column called Email. First name and last name columns are a bonus. If you do not have one yet, follow the guide for your practice software first.
  • Or just the email addresses, if you would rather paste them in.

  1. In ModularMail, open Audience, then click Add contacts and choose Upload contacts.

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  2. Confirm how your contacts agreed to hear from you, then tick the confirmation box and click Continue.

    Pick "They're a current or recent patient of the practice" for a patient list. Please do not upload purchased lists.

    Screenshot coming

  3. Choose Upload contacts from a CSV file (or Type or copy and paste emails), then click Continue.

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  4. Drag your file onto the box, or click it to pick the file. Files can be up to 4 MB. Then click Continue.

    Over 4 MB? Split the file in two and upload each part.

    Screenshot coming

  5. Check each column is matched to the right contact field.

    ModularMail matches Email, first name and last name for you. If a column is wrong, change it in the Contact field menu, or choose Skip this column. You must have one column matched to Email.

    Screenshot coming

  6. Read the summary, then click the Upload button.

    It shows how many contacts will be added, how many were already on your list, and how many were skipped. People who unsubscribed before stay unsubscribed.

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You should now have

A green "Upload complete" message and your new contacts on the Audience page.

If something looks different

"Match one column to Email to continue"
None of your columns was recognised as the email. In the Contact field menu next to the column that holds email addresses, choose Email.
Some rows were not read
Click "Show rows we couldn't read" in the last step. Usually it is a blank or mistyped email. They are skipped, and everyone else still uploads.
My upload is "held for review"
Large first uploads with no subscribe dates are checked by our team to protect your delivery. We will email you once it is added, usually within one business day.
The file will not open in step 4
It must be a .csv file. If you have an Excel file, open it and choose File, Save As, then "CSV (Comma delimited)".