Thread Entry limitations?

Summary

Is there a limit to how many characters/words/lines a thread entry can have?

Content

We noticed that when we send a long email it does not seem to be sent completely.

While testing, I am getting a bit confusing results. When I just sent random text with all kinds of formatting from OSvC, I received the first 80 lines of the email in my gmail address. When I sent another email with multiple formats but with just the line numbers in it, the received email was cut off at line 94. I then sent an email with just the line numbers again, but this time with simplest possible formatting (no line breaks etc) and received an email ending at line 116 (where even the number 116 was cut off at 1).