Smtp 550 message was not accepted

Smtp 550 message was not accepted. 0 < #5. Email unavailable. Smtp 550 message was not accepted. 228 smtp;550 5.	0 < #5. Recipient address rejected: access denied. Ошибка 550. 7. Otrs 6 smtp 25.
7. Roundcube. Forwarded message. Smtp 550 message was not accepted. Reason - prohibited file types.	Smtp 550 message was not accepted. Ошибка при отправке на почту. Deliver перевод. Delivery report. Ошибка 550.
Remote server returned '554 5. Exchange 2003. 7. Smtp 550 message was not accepted. 7.	Remote server returned '554 5. Отрс. Smtp 550 message was not accepted. Roundcube интерфейс. Ошибка при отправке письма.
Smtp 550 message was not accepted. Undeliverable message. 00550 ошибка. 228 message is rejected. Электронное письмо с ошибками.	Smtp 550 message was not accepted. 1 this message is blocked due to security reason. Smtp 550 message was not accepted. Smtp 550 message was not accepted. Reason - prohibited file types.
228 smtp;550 5. Smtp 550 message was not accepted. 7. Smtp 550 message was not accepted. Ошибка smtp outlook.	Smtp exchange. 550 5. Smtp 550 message was not accepted. Smtp 550 message was not accepted. Ошибка 550.
7. 7. Roundcube windows. Roundcube шаблоны. Smtp 550 message was not accepted.	Otrs 8. Smtp 550 message was not accepted. 550 5. Smtp 550 message was not accepted. Smtp 550 message was not accepted.
7. Smtp 550 message was not accepted. 1 this message is blocked due to security reason. Otrs 6. Smtp 550 message was not accepted.	228 message is rejected. Mail error. {"message":"","status":"fail"}. Сбой на email. Forwarded message from.
Otrs 6. 228 message is rejected. Smtp 550 message was not accepted. Ошибка 550. Smtp 550 message was not accepted.	228 message is rejected. Smtp 550 message was not accepted. Reason - prohibited file types. 7. Smtp 550 message was not accepted.
Exchange 2003. Smtp 550 message was not accepted. Remote server returned '554 5. Ошибка 550. 7.	Deliver перевод. 228 message is rejected. 1 this message is blocked due to security reason. 0 < #5. Smtp 550 message was not accepted.
Smtp 550 message was not accepted. Recipient address rejected: access denied. Roundcube шаблоны. 7. 7.	Smtp 550 message was not accepted. Smtp exchange. Recipient address rejected: access denied. Smtp 550 message was not accepted. Smtp 550 message was not accepted.