Can't send mail but receive is fine AWS and Vestacp

Question

I've been looking for my problem in Vesta Forum. I found some information, but still sending mail doesn't work.

1. My IP isn't on any black list

2. I turned Off ipv6, spamassasin and clamd in exim configuration like this:

   SPAMASSASSIN = no
   SPAM_SCORE = 50
   CLAMD =  no
   
   disable_ipv6=true
   

Mail are not sending from:

1. PHP mail() and Wordpress
2. Roundcube

In Roundcube I got following error, while sending to gmail:

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

***@gmail.com
host alt2.gmail-smtp-in.l.google.com [108.177.14.26]
SMTP error from remote mail server after pipelined end of data:
550-5.7.1 [52.210.16.21 7] 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. b10si20481ljd.189 - gsmtp

Reporting-MTA: dns; bobcars.pl

Action: failed
Final-Recipient: rfc822;***@gmail.com
Status: 5.0.0
Remote-MTA: dns; alt2.gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 [52.210.16.21 7] 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. b10si20481ljd.189 - gsmtp

While I'm sending to another (polish o2.pl)

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email protected]
    all hosts for 'o2.pl' have been failing for a long time (and retry time not reached)
Reporting-MTA: dns; bobcars.pl

Action: failed
Final-Recipient: rfc822;[email protected]
Status: 5.0.0

Can anyone help me please?

Answer 1

Thanks to offical VestaCP forum i've noticed that you need to contact AWS to reduce your sending email limits.