Mentioning Wrong Names
While sending multiple mails, people usually prefer the copy-paste practice and the mail turns out to have wrong names and subject lines. The solution to this is personalization. Personalizing the mails makes them unique and they stand out compared to the ones sent in bulks.

Not Focusing On The Importance
If you wish to achieve more responses from receivers, the message of the mail should be noticeable and appear lucid as mentioned in the subject line, with the addition of a time frame to mark the urgency to the receiver.

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