Problem send email pro CWP

I tested the webmail and I sent an email from google to me it worked perfectly

but when I send an email from this error below


Message:

Hello I've CWPPro and I have a problem.

Webmail works just send, but when I send a email for google for example these message shows :

Queue ID             |   Size  |        Arrival Time       |     Sender/Recipient

431694ED        824 Sat Apr 25 21:55:13  contato@myDomain.com
(connect to alt2.gmail-smtp-in.l.google.com[172.217.218.27]:25: Connection timed out)
                                         myemail@gmail.com

1)  Can you send email to other services (Not Gmail)

2)  Check out firewall, and make sure TCP_OUT includes 25 as well as TCP_IN

3)  Check your ip using MXToolbox for Blacklists

I sure the problem is MXToolbox, but I don't know fix it, u can help ? any tutorial ?

I test my domain https://mxtoolbox.com

and have problems, Just missing this for my web service be ok.

I don't have much knowledge of DNS and webmail I expected CWP pro to do everything