I'm sure you all read the Exchange team blog http://blogs.techent.com/exchange but in case you don't and you stumble upon my blog first (highly unlikely) they have announced the "Network ports for clients and mail flow in Exchange 2013 TechNet" article.
Check It out:
https://technet.microsoft.com/library/bb331973%28v=exchg.150%29.aspx
Enjoy!