On 2014/4/7 4:15 PM, Matthias Apitz wrote: -snip- > I can imagine that the problem is: a sender is always one person, while > the recipients could be many.
Actually, a sender is not always one person. If you have multiple Google accounts, for example, which you configure as SMTP & POP (or IMAP) servers, for example, then life becomes difficult if you DON'T use the SMTP server that matches the POP (or IMAP) server.