A regular-interval mail feeding apparatus is disposed between an automatic mail discriminating/postmarking apparatus and an automatic mail sorting apparatus, in an automatic mail handling system. When various kinds of mails are fed at irregularly intervals from the postmarking apparatus to the feeding apparatus, it temporaling stocks the mails at its stock and sends out the stocked mails one by one at a predetermined intervals to the sorting apparatus. When one kind of mails are fed at regular intervals, the feeding apparatus directly conveys the fed mails to the sorting apparatus without passing through the stock, by changing the mail conveying path in the feeding apparatus by using a gate member.
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