Hello,
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if you need only function to keep moving "READ" email to certain folder then I can do in 1 day and would charge around HKD 1500. you will be able to config your accounts, practically as many as you and time interval. Program will keep doing its works and will also provide you daily report in CSV format, if you need so.
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if you need feature of reading and composing etc operations for all mail accounts at sametime then I can provide Browser based program and it will cost min HKD 2500 and quote will depend on how many features you are looking.
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Good Luck. Thanks