Too many addressees causes weirdness.

[beaky]

An organisation I belong to accidentally sent an email 'to' about a third of its membership. There were between 1500 and 2000 addresses in the to list!
At the time I received this  I had the settings to view all of the addresses. More of this below.
I found two issues. First, although all of the to: addresses could be seen, none of the message could. This despite the fact that the first lines of the message do appear in the message list, so were downloaded from the start.
Second, the scrolling action became jerky and stiff. It was not possible to 'flick' up to scroll to the bottom. I had to drag through the whole lot.
Now the good news - tapping in a blank area of the header collapses the list, and makes the content visible. Combined with the fact that this email was truly exceptional, it is clear this is either not a problem, or at least is not significant.
What would be interesting to know, though, is: is this an android effect or an app effect?

[Kostya Vasilyev]

This is a combination of a bug and a feature in my app.

Feature: the message header has two modes, brief and full. In full header mode, it can take up to the entire screen height.

Bug: the full header mode's vertical scrolling does not have kinetic scrolling. This is related to how the header can be swiped to the side to navigate to prev / next message (that's the primary function, and vertical scrolling just needs more work).