The Post Office committee was a regular recipient of complaints from southern states concerning the transmission of abolitionist mailings , which were seen there as incendiary ; the matter was of some controversy .
Southern legislators sought to have these types of mailings banned .
The Post Office committee was a regular recipient of complaints from southern states concerning the transmission of abolitionist mailings , which were seen there as incendiary ; the matter was of some controversy because southern legislators sought to have these types of mailings banned .