how was my hotmail found?

 i saw an email about work, related to a check i had overnighted. nothing unusual there, except it went to my hotmail account. i don't know how the recipient found it. and i am wondering why they didn't try customer service first. i decided to forward it to my account with the bank and said i would look at it the next day. it was from a sports team, the st. louis blues. i recall adding 'ticket office' to the address when i created the label, figuring it was for tickets. as for what i saw during normal work hours, there was requests to pull and shred checks from an afternoon file. it was for four checks, three different emails. at least it was before i printed the file. and one of the overnights in the afternoon i recognized the recipient on. it was 'return to business line' and it was lumped together with another check for this colleague. i like saving time, and overnight labels, especially late in the day. in the evening i went to perform. i did some bank stories, annoyances with interactions at home, and the two-movie weekend. during my walks i found 77 cents. the 'big bang theory' reruns were when penny became addicted to an online video game. it was followed by the one where sheldon was interviewed for a documentary about star trek's leonard nimoy.