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Many legacy systems, SMTP relays, and email verification services accept only plain text lists. They often reject Excel files due to security or compatibility concerns.

grep -E '^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]2,$' emaillist.txt > valid.txt

If you have a list of emails in another format, you can convert it quickly:

: Use a simple HTML form to collect the email address.

Email List Txt Instant

Many legacy systems, SMTP relays, and email verification services accept only plain text lists. They often reject Excel files due to security or compatibility concerns.

grep -E '^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]2,$' emaillist.txt > valid.txt Email List Txt

If you have a list of emails in another format, you can convert it quickly: Many legacy systems, SMTP relays, and email verification

: Use a simple HTML form to collect the email address. Many legacy systems