Impossible send mails

[Giancarlo]

TITLE:

Impossible send mails​

PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE:

windows​

PROBLEM DESCRIPTION:

Hi to everyone.
It's my first time i write here.

I have this problem.
All my mails are unsent. I've already delisted my IP from blacklists, but still i'm not able to send emails.

Here one of the mails:

host gmail-smtp-in.l.google.com[173.194.76.27] said:
552-5.7.0 This message was blocked because its content presents a potential
552-5.7.0 security issue. Please visit 552-5.7.0
File types blocked in Gmail - Gmail Help to review our 552 5.7.0
message content and attachment content guidelines. d4si1429155wrj.147 -
gsmtp (in reply to end of DATA command)

Can you help me?

Thank you!​

STEPS TO REPRODUCE:

solve the problem​

ACTUAL RESULT:

have this problem.
All my mails are unsent. I've already delisted my IP from blacklists, but still i'm not able to send emails.

Here one of the mails:


host gmail-smtp-in.l.google.com[173.194.76.27] said:
552-5.7.0 This message was blocked because its content presents a potential
552-5.7.0 security issue. Please visit 552-5.7.0
File types blocked in Gmail - Gmail Help to review our 552 5.7.0
message content and attachment content guidelines. d4si1429155wrj.147 -
gsmtp (in reply to end of DATA command)

Can you help me?​

EXPECTED RESULT:

solve the problem​

ANY ADDITIONAL INFORMATION:

​

YOUR EXPECTATIONS FROM PLESK SERVICE TEAM:

Answer the question​