I’m currently using mxtoolbox’s IP blacklist check. They check up to 6 IP’s only once a day and charge $20 / month. I feel like that’s a bit steep when i have all these other licenses and monthlies i have to pay for. And if we ever do get on a blacklist, i’m still always the last to hear about it because it only checks once a day, while my clients check their email once every couple minutes. Does anyone know of a good IP blacklist check software or service that doesn’t cost that much and checks more often than once a day and can add more ip’s than just 6?
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