Final answer:
When emailing someone you don't know personally, avoid using titles to prevent potential offense. Start with a formal salutation and use the recipient's preferred name if known.
Explanation:
It is important to avoid using a person's title in an email if you do not know the recipient personally to prevent potential offense. For formal emails, it is advised to begin with a salutation like 'Dear' and use the recipient's preferred name and title if known. Avoid gendered titles unless you are certain of the recipient's preference.
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