What Does "RE" Mean in Email?

“Re:” in an email subject line stands for “reply”. It derives from Latin loanwords, meaning “again” or “in reference to”. ‘RE’ is commonly used in email etiquette to indicate that the email is a response to a previous message on the same topic.



Here’s why “Re:” is important:

  • Clarity:

    It immediately informs the recipient that the email is a reply, preventing confusion about the purpose of the message.

  • Conversation Flow:

    “Re:” helps maintain the conversation thread by referencing the original subject line. This is particularly helpful when managing email exchanges with multiple replies.

  • Professionalism:

    Using “Re:” adheres to established email etiquette, demonstrating professionalism and respect for the recipient’s time.



While some email clients automatically prepend “Re:” to reply subject lines, it’s generally considered good practice to double-check and ensure the subject line accurately reflects the conversation.

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