Through analysing and comparing different internal architectures of network server , it brings up process - pool - based smtp server , pop3 server and wmg server , and the mta server based on the single process concurrent service ( spcs ) architecure . at the same time , the resolvement of critical network i / o issues related to spcs is analyzed and figured out 通過對五種網(wǎng)絡(luò)服務(wù)器內(nèi)部架構(gòu)的分析和比較,最后提出:基于進程池的smtp服務(wù)器、 pop3服務(wù)器、 wmg服務(wù)器,基于單進程并發(fā)服務(wù)( singleprocessconcurrentservice ? spcs )架構(gòu)適合用于實現(xiàn)高性能的mta ,同時分析并給出了單進程并發(fā)服務(wù)器中關(guān)鍵的網(wǎng)絡(luò)i o實現(xiàn)技術(shù)。