Unable to send e-mail

[vertigoserver]

Hi.

We are new with Vesta, just installed a new server, we can send e-mail to any domain using roundcube.

The problem is we can´t send e-mail to GMAIL using any php script, we get this error:

host gmail-smtp-in.l.google.com [74.125.22.27]:
550 5.7.1 [CS] Spam Detected. Contact your service provider for support

IP is not blocked by Gmail, because e-mails from Roundcube are fine.

Any help will be appreciated.

Thanks.

[skurudo]

Check your IP with mxtoolbox.com

[vertigoserver]

Ip is clean

We reinstalled server with CentOS and Directadmin and all e-mails are coming out.

So we reinstalled again with CentOS and Vesta and again same problem.

This is very strange.

[skurudo]

You can't send mail only to gmail or on different servers too?

[vertigoserver]

Just Gmail

[MCK2]

Here Gmail and Hotmail

My IP is 100% good in mxtoolbox.com

[skurudo]

Here Gmail and Hotmail
My IP is 100% good in mxtoolbox.com

Gmail / hotmail don't like your IP or your mail.

You can try to contact with Google about this prob:
https://support.google.com/mail/contact/msgdelivery

[MCK2]

Solved!

soluction is disable ipv6...

CentOS:
http://www.unixmen.com/disable-ipv6-centos-7/

[dpeca]

actually, right solution is to make a reverse DNS to your ipv6... not to disable ipv6... because, one day, everything will be switched to ipv6...
gmail rejected your emails because you don't have a reverse DNS for ipv6...

[skurudo]

dpeca, absolutely right.

reverse DNS or disabling ipv6.