Liam tells me "<3" is a thing that humans like sending each other...
Just so you know, I vaguely remember Kesh saying that Nexus leadership has access to all Tempest email servers, since the Tempest is Initiative property and all Pathfinder team activities should be subject to Nexus oversight. Not saying Tann's looking at our letters, just saying he could, if he wanted to.
So, yeah, unless you want Tann to know what the Pathfinder's up to in their free time (i.e. the Turian on board), maybe keep the emails pretty tame? Unless you DO want to give Tann some kind of aneurysm...