Joe sent out 100 emails

That is correct. Joe sent out a total of 100 emails.

Step 1: Joe composed 100 emails.

Step 2: Joe entered the email addresses of the recipients.
Step 3: Joe wrote the subject line for each email.
Step 4: Joe wrote the message for each email.
Step 5: Joe attached any necessary files or documents to the emails.
Step 6: Joe reviewed each email for any spelling or grammatical errors.
Step 7: Joe clicked the send button to send out the emails.