hi good day
in my office - i send mails each day - lots of mails. But some of my mailing partners do not get the mails _ in fact - all of them are google-mail-user.
so in other words: all those who use google-mail do not get my mails
i get a response:
This message was created automatically by the SMTP relay on mail.mail-server.... A message that you sent could not be delivered to all of its recipients. The following address(es) failed: email@example.com host gmail-smtp-in.l.google.com [000.000.000.00] SMTP error from remote mail server after end of data: 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 https://support.google.com/mail/?p=BlockedMessage to review our 552 5.7.0 message content and attachment content guidelines. o3-20020a170906974300b444400715867844445653
well what happened here !? What can i do here!?