BUG Problem: Gmail --> Alias@domain --> Gmail

I'm trying to send emails from Gmail to an alias and the alias to a Gmail:

aaa@gmail.com --> alias@domain.com (cwp) --> bbb@gmail.com

Give problems and canceled Gmail mail because he thinks it is SPAM (I think that is sent from a Gmail IP).

If I use any other email address other than Gmail it works perfect, but only gives problems with Gmail to alias to gmail.


Delayed Mail (still being retried)


----Original Message-----
From: Mail Delivery System
[mailto:MAILER-DAEMON@domain.ext] CWP
Sent: Monday, October 10, 2016 9:43 PM
To: bbb@gmail.com
Subject: Delayed Mail (still being retried)

This is the mail system at host server10.xxxxxx.com

####################################################################
# THIS IS A WARNING ONLY.  YOU DO NOT NEED TO RESEND YOUR MESSAGE. #
####################################################################

Your message could not be delivered for more than 4 hour(s).
It will be retried until it is 5 day(s) old.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own
text from the attached returned message.

                   The mail system

<aaaa@gmail.com> (expanded from <xxx@domain.ext>): host
    gmail-smtp-in.l.google.com[74.125.206.26] said: 550-5.7.1
[213.136.84.143
    12] Our system has detected that this message is 550-5.7.1 likely
    unsolicited mail. To reduce the amount of spam sent to Gmail, 550-5.7.1
    this message has been blocked. Please visit 550-5.7.1
    https://support.google.com/mail/?p=UnsolicitedMessageError 550 5.7.1
for
    more information. si5si1471114wjb.23 - gsmtp (in reply to end of DATA
    command)

Final-Recipient: rfc822; bbbbb@gmail.com
Original-Recipient: rfc822;alias@domain.ext
Action: delayed
Status: 4.7.1
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 [213.136.84.143      12] Our system has
    detected that this message is 550-5.7.1 likely unsolicited mail. To reduce
    the amount of spam sent to Gmail, 550-5.7.1 this message has been blocked.
    Please visit 550-5.7.1
    https://support.google.com/mail/?p=UnsolicitedMessageError 550 5.7.1  for
    more information. si5si1471114wjb.23 - gsmtp
Will-Retry-Until: Sat, 15 Oct 2016 22:56:31 +0200 (CEST)