: A plain text file has no metadata or complex styling, making it the fastest format for scripts to read and parse.
In email marketing, engagement is the currency that matters. ISPs track how recipients interact with your messages. If people open your emails, click your links, and reply to your messages, your sender reputation skyrockets. If they ignore you or click "Report Spam," your reputation dies. Consider these two scenarios: 1000000 email listtxt better
: Large providers like Constant Contact have strict file size limits; they typically allow up to 1M rows in a .csv but only 40,000 in a .txt . Converting to .csv is almost always better for compatibility. : A plain text file has no metadata
Purge users who have not opened an email in 90 days. If people open your emails, click your links,
With 1M emails, you are a high-value target for GDPR and CAN-SPAM fines.
(USA), sending unsolicited emails to people who haven't opted in can result in massive fines. High Bounce Rates