Verb conjugation of "bubble" in English

The picture I sent yesterday was taken on the first evening. And this morning the email bounced back. The user has already uploaded 3 different pictures of himself, all with the same facial expressions.
We can communicate via Skype if it acceptable to you. It's easier. I can also write you via regular email and attach photos. My hobbies are hunting and mountain climbing. The later is pretty dangerous.
What problems did you have when you had to share your flat with your mates? Probably you were not used to it. We say that when we live close we usually discover many issues that were not known.