Add header to specific emails?

Development
1

So I have an IP rotation setup on my PMTA server, and I’m looking to have different sets of emails include a header so that my PMTA server will know which IPs to send from, what’s the simplest way to go about this? (Adding a header to sends from a specific email channel)



Thanks!

2

So I have an IP rotation setup on my PMTA server, and I’m looking to have different sets of emails include a header so that my PMTA server will know which IPs to send from, what’s the simplest way to go about this? (Adding a header to sends from a specific email channel)

Thanks!