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 the maximum number of recipients per message
that the RFC (Internet standards) suggests accepting.
If you would like to change this setting, open the MDaemon console:
- Click Setup
- Click Server Settings
- Select Servers
- Edit the value beside Max RCPT commands allowed field
- Click OK