This is one of the many antispam tools ISPs are not employing. Why a home user would need to send copies to more than 5 is debatable and I won't debate it here.
I know ISPs that are turning this on and I agree with it.
I had to reinstall my PeoplePC software. Prior to reinstallation I could forward funny emails to everyone in my address book at one time. Now if I try to mail everyone at once I get this error message: 550 Your message does not conform to RFC2822 standard
But I can still send messages as long as there are no more than 5 recipients.
My e-mail client is IncrediMail and I have preformed all of their help instructions. Upon which they said if problem persist contact service provider.
My ISP is PeoplePC, version 6.2. I've e-mailed tech support 2x and no answer.
My OS is WinXP Home Edition, version 5.1 (Build 2600.xpsp_sp2_gdr.050301-1519 : Service Pack 2). I checked the Microsoft web site and they list all kinds of info - but it is way beyond my understanding.
Can anyone give me a plain English step-by-step way to fix this problem.