I Need help please?

[tmoore]

You mentioned the firewall.
Can you check if you have the firewall disabled for IPv6?
If so, can you enable it for IPv6 and check if it is now sent correctly?

By default, the mail server is set up to use down ipv4 and ipv6, so it may be trying to send by ipv6.

[mezooking2060]

Ipv6 = on
Ipv6_icmp_strict = off
Ipv6_spi = on

These are the settings

[tmoore]

Check if you also have:

SMTP_BLOCK = OFF

at CSF configuration.

If yes, message me tomorrow between 12 and 00 UTC to take a look by anydesk

[mezooking2060]

SMTP_BLOCK = OFF
Yes

Can we choose a later time?

[tmoore]

Message me when you can, i will be online for the next 8h

[mezooking2060]

Until now
I didn’t find any solutions

[mezooking2060]

I did that and the problem is still there

[entoutcas]

if you don’t send logs, nobody can help you.

[leadership]

What records do you want to send?

[shoaibkk]

Share complete mail logs?

[leadership]

Where do I find the file?

[tmoore]

leadership issue found

Issue: Email server trying to send by ipv6, but VPS didn’t support ipv6.

Solution: Disable ipv6 by doing the following steps:

1 - Edit the file

/etc/postfix/main.cf

2 - Look for:

inet_protocols = all

3 - Change into:

inet_protocols = ipv4

4 - Restart postfix:

systemctl restart postfix

[leadership]

so ipv6
Unable to send or must be specified in the file

[leadership]

I want to thank you my friend

To solve the problem and please create a video explanation so that all subscribers can benefit