How to achieve more personalized mass email sending in Outlook 2003

We know that, if we need to send emails to multiple recipients in Outlook 2003, we can simply input multiple email addresses separated by semicolons or use the CC method when specifying recipients. If there are many recipients, we can also use a distribution group for bulk sending. However, regardless of which method is used, it doesn't leave a very good impression, as it may not seem very polite. Hehe.