Need help on Email header Error

I was using outlook to send emails, from the last 10 days some my emails were not getting delivery reports or getting some other errors, i check with bigrock they sent me the below:

For the attached header, our Anti-Spam Filter Team has updated with below information:-
-----------------------------
The fingerprint is for:
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_00A8_01D4AC47.D5F7A860"

can someone please let me know how to fix this or help me in fixing this error.

Thanks in advance

#please do move it to the right section if this is not the right place

KJREDDY247@ said:

Content-Type: multipart/alternative;
boundary="----=_NextPart_000_00A8_01D4AC47.D5F7A860"

Click to expand...

Without seeing the content of your email, it looks most likely that the body of your message has been determined to be spam. Take a look at the rfc1341 MIME spec to understand what that error message is referring to: https://www.w3.org/Protocols/rfc1341/7_2_Multipart.html

packetstream said:

Without seeing the content of your email, it looks most likely that the body of your message has been determined to be spam. Take a look at the rfc1341 MIME spec to understand what that error message is referring to: https://www.w3.org/Protocols/rfc1341/7_2_Multipart.html

Click to expand...

they sent me the same link for the reference but i dint understand where exactly i am doing it wrong? can DM you a copy of MY email template is it possible for you to take a minute?