Email Alias Checker

This tool (Email Alias & Duplicate Checker) can quickly detect format errors, email aliases, and duplicate mailboxes in your email list, and automatically clean up redundant emails to ensure list accuracy and uniqueness.

Email Alias Checker

This tool (Email Alias & Duplicate Checker) can quickly detect format errors, email aliases, and duplicate mailboxes in your email list, and automatically clean up redundant emails to ensure list accuracy and uniqueness.

Email List:
Settings:
Results:Please copy and save manually
Email Alias Rules for Gmail, Yahoo Mail, and Outlook:
  • Gmail Alias Rules:
    1. + Alias: Gmail supports adding "+" and text after the username as an alias, e.g., [email protected]. All emails will still be delivered to the original address.
    2. Ignore Dots: Gmail ignores all dots in the username, e.g., [email protected] and [email protected] are considered the same mailbox.
    3. Domain: Gmail supports both @gmail.com and @googlemail.com, which are treated as the same mailbox.
  • Yahoo Mail Alias Rules:
    1. - Alias: Yahoo supports adding "-" and text after the username as an alias, e.g., [email protected]. Emails are delivered to the original address.
    2. Dots Matter: Yahoo does not ignore dots in the username, e.g., [email protected] and [email protected] are different mailboxes.
    3. Domain: Yahoo supports multiple country domains including @yahoo.com, @yahoo.co.uk, @yahoo.com.tw, etc. Different domain mailboxes are independent, e.g., [email protected] and [email protected] are different mailboxes and cannot communicate with each other.
  • Outlook Alias Rules:
    1. No + Alias: Outlook does not support "+" aliases after the username. For example, [email protected] is not a valid format in Outlook.
    2. Dots Matter: Outlook does not ignore dots in the username, e.g., [email protected] and [email protected] are different mailboxes.
    3. Domain: Outlook supports @outlook.com, @hotmail.com, and @live.com, but addresses from different domains must be set up as official aliases to share the same mailbox.