Multiple mail written by send_campaigns command

[premhunt]

The pickup directory has been added with multiple mail at the place of single mail. So there is duplicate mail going to customer.
Even the delivery servers usage when defining multiple server in config.json is not picked

Regards,
Prem

[twisted1919]

How does your config.json file looks like?
Related to defining multiple servers in config.json, you need to skim the code to see exactly when a second/third/etc server would be choosen.