150k: Mailaccess.txt

Sending emails to a 150k list without verification will likely get your IP blacklisted.

Remove entries that lack an "@" symbol or have invalid extensions (e.g., .con instead of .com ). 2. List Segmentation 150k mailaccess.txt

Use services like ZeroBounce or NeverBounce to identify "dead" or "disposable" email addresses. Sending emails to a 150k list without verification

Do not load the entire 150k file into RAM. Use a stream reader to process it line-by-line. 150k mailaccess.txt

A list of 150,000 entries is too large to treat as a single block. Segmenting the data improves efficiency: