LOS ANGELES, CA–(Marketwire – 04/28/11) – Stamps.com (NASDAQ: STMP – News ), the leading provider of postage online and shipping software solutions, today announced results for the first quarter ended March 31, 2011. For the first quarter: Core PC Postage revenue, which excludes the enhanced promotion channel, was $20.6 million, up 14% from the first quarter of 2010. Non-core PC Postage revenue …
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