I have created hosting but when i send email to gmail , always failed
Here is log from webmail
: host
gmail-smtp-in.l.google.com[2404:6800:4003:c03::1a] said: 550-5.7.1
[2400:8901::f03c:93ff:fedc:918c] Gmail has detected that this message
550-5.7.1 does not meet IPv6 sending guidelines regarding PTR records and
550-5.7.1 authentication. For more information, go to 550 5.7.1
https://support.google.com/mail/?p=IPv6AuthError
t42-20020a056a0013aa00b006d990db77besi5017574pfg.135 - gsmtp (in reply to
end of DATA command)
Reporting-MTA: dns; apptob.tobiku.com
X-Postfix-Queue-ID: DD74C600D4
1 Reply
jhartman
Linode Staff
Many (if not all) major mailing providers require you to have specific DNS records configured and fully propagated. Based on your error message and my ability to see your Linode's configuration, you have not setup the records necessary to securely send mail.
The following records need to be configured on your Linode before you can send mail:
As you have discovered, if these records are not properly configured, many mail providers will immediately block all mail sent to their domains. If you intend to send mail via IPv6, please be sure to setup records for the appropriate IPv6 address(es).
In these instances where you have sent mail without proper DNS records and a provider has blocked your IP address, you should open a Support Ticket so that we can attempt to request delisting from that provider's blocklist. Please keep in mind that we cannot guarantee delisting from every provider and cannot initiate the request until all records (rDNS, SPF, MX) have been configured and propagated. Be sure to include the full 5xx error message since this needs to provided when we request delisting.
For more information about the "best practices" and information about how to run a mail server, be sure to review the following guide: