To protect your email data, industry best practices are to encrypt (hash) your emails before sharing them.
Many of our clients use the DCCC hashing tool, which encrypts using the MD5 protocol.
Step 1: export your emails from your CRM. Select only the email field if your CRM permits. Do not use quotes around the emails.

If your CRM does not let you select emails only, then open the export file in Google Sheets or Excel and copy the email column to an empty file and save it.
Step 2: open your email file for review in a convenient program.

DCCC requires the first row to contain only the word “email” (all lowercase) so change the first row if needed, then save the file.
Step 3: open the DCCC hashing tool in your browser (preferably Chrome). Scroll down to  “Generate Hashfile”. Use the “Browse” button on the right to load your email file (.csv or .txt). Leave the Case of Hashfile setting as “Upper.” Click the “Hash File” button to begin.

When the hash is complete, you will see a green download button that will save the hashed file to your disk.
Step 4: Send us the hashed file (not the emails)

If you are using, after you see the district counts you will be prompted to upload your hash file – click the “MD5 Hashes” button on the right.