[Exim] Problems sending HTML messages to Yahoo (and others?)

Hi,

I've been noticing more messages being returned by
Yahoo with the error:

"SMTP error from remote mailer after end of data: host
mx4.mail.yahoo.com [66.218.86.254]: 552 Put ,E=\r
     at the end of Mether, Mtcp, or Msmtp in
sendmail.cf if you are using Solaris 2.5 (fixed in
2.5.1). I cannot accept messages with stray newlines.
Many SMTP servers will time out waiting for \r
    .\r
    ."

It seems to relate only to some HTML messages - for
example, i generate an error every time regardless of
the message when sending from Outlook 2002/XP.

Anyone else having this problem?

Thanks.

Tim




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