Hello: Hoping someone can provide an answer. When I receive an email that has been sent to multiple people I have difficulty replying to all. Seems whatever email program the sender is using OSX mail doesn't like it. The address format their program uses is different from the mac format. i.e. the format they have is: JohnDoe@whatevermail.com <'JohnDoe@whatevermail.com'> When I attempt to reply all I get an error message saying 'email@example.com' does not appear to be a valid address. Seems the OSX mail program doesn't like the ' in the address. Anyone know how I can correct this so OSX mail will recognize it or should I get a third party email program like Postbox? Thanks so much.