Mail merge email rejections: more than 50 recipients

I've just done a mail merge to 120 email addresses and several addresses rejected the message saying that they were considered spam because there were more than 50 addresses in the header.

But this doesn't make sense - the whole point of using MS Word's merge to email function is so that only one address appears in each message.

What's the story here?

 

Sounds like some of the receiving email servers are setup with a restriction of no more than 50 email addresses in the header.

 

Hi Steve, no groups, just single email addresses.

SpywareDr: there is only one address in the header because I did the merge through MS Word.

 

Then how are the email servers that are rejecting your email able to determine that there are "more than 50 addresses in the header "?

Maybe Word is cramming all the other available email addresses into the BCC field?