dreamyeye1
New member
- Joined
- Sep 5, 2023
- Messages
- 1
I have rented a virtual cloud server from the Hetzner data center.
I have installed CentOS 8 on it and also installed DirectAdmin.
My web service is using Nginx.
The issue I'm currently facing is that when I send an email, it doesn't get delivered. It appears to be sent, but no email reaches the recipient. In fact, there is no error message shown in the normal mode.
However, when I send emails to Gmail, I receive the following error message
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:
ediusfa.ir{@}gmail.com
host gmail-smtp-in.l.google.com [2a00:1450:400c:c04::1a]
SMTP error from remote mail server after pipelined end of data:
550-5.7.25 [2a01:4f8:c012:3d3b::1] The IP address sending this message does not
550-5.7.25 have a PTR record setup, or the corresponding forward DNS entry does
550-5.7.25 not point to the sending IP. As a policy, Gmail does not accept
550-5.7.25 messages from IPs with missing PTR records. Please visit
550-5.7.25 https://support.google.com/mail/answer/81126#ip-practices for more
550 5.7.25 information. hg25-20020a05600c539900b003fed4d7f2fcsi6409919wmb.187 - gsmtp
Reporting-MTA: dns; server.sepidedit.com
Action: failed
Final-Recipient: rfc822
Status: 5.0.0
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.25 [2a01:4f8:c012:3d3b::1] The IP address sending this message does not
550-5.7.25 have a PTR record setup, or the corresponding forward DNS entry does
550-5.7.25 not point to the sending IP. As a policy, Gmail does not accept
550-5.7.25 messages from IPs with missing PTR records. Please visit
550-5.7.25 https://support.google.com/mail/answer/81126#ip-practices for more
550 5.7.25 information. hg25-20020a05600c539900b003fed4d7f2fcsi6409919wmb.187 - gsmtp
--------------------
[root@server ~]# nmap 128.00.121.40 -p 25
Starting Nmap 7.92 ( https://nmap.org ) at 2023-09-05 19:56 UTC
Nmap scan report for server.sepidedit.com (128.00.121.40)
Host is up (0.000068s latency).
PORT STATE SERVICE
25/tcp open smtp
Nmap done: 1 IP address (1 host up) scanned in 0.12 seconds
I have installed CentOS 8 on it and also installed DirectAdmin.
My web service is using Nginx.
The issue I'm currently facing is that when I send an email, it doesn't get delivered. It appears to be sent, but no email reaches the recipient. In fact, there is no error message shown in the normal mode.
However, when I send emails to Gmail, I receive the following error message
Mail delivery failed: returning message to sender
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:
ediusfa.ir{@}gmail.com
host gmail-smtp-in.l.google.com [2a00:1450:400c:c04::1a]
SMTP error from remote mail server after pipelined end of data:
550-5.7.25 [2a01:4f8:c012:3d3b::1] The IP address sending this message does not
550-5.7.25 have a PTR record setup, or the corresponding forward DNS entry does
550-5.7.25 not point to the sending IP. As a policy, Gmail does not accept
550-5.7.25 messages from IPs with missing PTR records. Please visit
550-5.7.25 https://support.google.com/mail/answer/81126#ip-practices for more
550 5.7.25 information. hg25-20020a05600c539900b003fed4d7f2fcsi6409919wmb.187 - gsmtp
Reporting-MTA: dns; server.sepidedit.com
Action: failed
Final-Recipient: rfc822
Status: 5.0.0
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.25 [2a01:4f8:c012:3d3b::1] The IP address sending this message does not
550-5.7.25 have a PTR record setup, or the corresponding forward DNS entry does
550-5.7.25 not point to the sending IP. As a policy, Gmail does not accept
550-5.7.25 messages from IPs with missing PTR records. Please visit
550-5.7.25 https://support.google.com/mail/answer/81126#ip-practices for more
550 5.7.25 information. hg25-20020a05600c539900b003fed4d7f2fcsi6409919wmb.187 - gsmtp
--------------------
[root@server ~]# nmap 128.00.121.40 -p 25
Starting Nmap 7.92 ( https://nmap.org ) at 2023-09-05 19:56 UTC
Nmap scan report for server.sepidedit.com (128.00.121.40)
Host is up (0.000068s latency).
PORT STATE SERVICE
25/tcp open smtp
Nmap done: 1 IP address (1 host up) scanned in 0.12 seconds