In Custobar, you can now define a custom utm_source value for your email messages. You can set the value manually for a campaign, or modify the default value from "custobar" to whichever value makes more sense to you!
To set it manually:
Set the UTM tag value in the campaign editor's email properties tab, when you want to override the default value "custobar" for a single campaign.
To set a default value:
Go to Settings / Advanced settings and edit the "Default UTM source value".
If you have any questions or concerns, please contact us at email@example.com