From the look of it, this need not have to be hacked accounts. Normally spammers create thousands of accounts on free email services and the bots are used to au

From the look of it, this need not have to be hacked accounts. Normally spammers create thousands of accounts on free email services and the bots are used to auto login and send spams out. Mails sent from hotmail, msn etc has better chances of reaching your inbox than that sent from custom domains which could easily end up in spam folders. The spammers favorites are hotmail and msn as they are easy to create. Gmail has phone verification and other added stuffs that makes it difficult for bots to create accounts. The server that redditer accessed could be the spammer's server where he stored the user name / passwd in plaintext format for the bots.