Too Many Recipients error (452) (MDaemon 9.x and below)
My users get a '452 - too many recipients' error when sending to more than 100 users.
By default, MDaemon sets a limit of 100 recipients per message received via SMTP. This is what the RFC (Internet standards) suggest.
If you would like to change this setting:
- Open the Setup menu
- Click on Miscellaneous Options
- Select the Servers tab
- Edit the value under the 'Allow this many RCPT commands per message' field
- Click Apply and OK