If your connected to a public hotspot that requires you to authenticate (usually just accepting the User Policy for the free ones) through some sort of web-portal. For example: wayport, sbux, or mcdonalds, then its possible that is whats causing both to go at the same time.
I assumed it would also happen if you are connected to a malfunctioning hotspot as well. If I disable wifi, or connect to a normal (home) hotspot it works fine again.
I have exactly the same prob. SSL certificate for IMAP and smtp is not accepted by pre3 while working on pre- support say this special IMAP server is incompatible, but come on IMAP is a standard how can a standard protocol not be compatible? So far I forward the mails to google but this doesn't work for sending mails. Hope anyone have a suggest.