Check out the best alternative tools you can use as a replacement for PostApex.
PostApex connects advertisers with premium, highly targeted email newsletters across their network enabling you to directly reach your audience. For publishers they work with premium advertisers to help you fill ad space, and scale your sponsorship operations. You will get a list of ads that you pick from, and you can style the advert into your newsletter as you see fit.
PostApex supports a bunch of features including marketplace, programmatic ads, and more so any alternative needs to provide similar feature sets.
