When trying to send an email signature attached, do not send and gives a message that is spam

Hi, can you please make a screenshot of this issue?
What version of eM client are you currently using?

Thank you,

Version  6.0.20489.0

Hi, unfortunately this is a server issue, I believe your domain or your IP address is blacklisted, please contact your mail service provider in order to resolve this issue, I’m afraid I can’t be more helpful in this matter.

Thank you for understanding, hope you’ll be able to resolve this issue,