My day job is Director if IT, IS, and Security. I would not worry about your email password unless it happens to be (have been) the same as your canoetripping password. In that case, you definitely need to change both.
That aside, the least to expect is a bunch of spam. More insidious is the possibility of a phish attack - where a message that appears to be from someone with whom you know or regularly communicate asks for personal information. For example, the attacker could send you a message that would appear to be from the canotripping admin, asking you to follow a link and to enter a new password. As a rule, never follow links that ask for this type of information, even if you believe it to be legitimate. Instead, navigate as you normally would to the link location.