If you do not want to use a cold outreach tool, here are two other alternatives for sending emails to multiple recipients:
#1 is Outlook – Using Mail Merge
Craft your email in MS Word.
Link an Excel sheet with recipient data for personalization.
Send individualized emails in bulk.
#2 is Gmail – The BCC Method
A simple option but lacks personalization.
Use this for small-scale outreach only, and always add your email in the “To” field for better deliverability.