Maileet use all the time for downloading. Your ISPs can't penalize you if you are downloading Maileet.
IP Filtering - Your ISP may fire you, or deny access from their servers to companies that is behind their firewall. What is worse than that - your ISP may price you the cost of their bandwidth by implementing rate limiting. Maileet works behind the firewall. It only listens to the ports you configurate, and not to the whole ISP.
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