[pfx] Re: I keep getting disabled on [email protected] mailing list

Hi,

On 09/06/2026 9:22 am, Bill Cole via Postfix-users wrote:
> On 2026-06-08 at 22:01:54 UTC-0400 (Mon, 08 Jun 2026 22:01:54 -0400)
> Al <[email protected]>
> is rumored to have said:
> 
>>> is rumored to have said:
>>> 
>>>> Hi,
>>>> 
>>>> I keep getting disabled on [email protected] mailing list. I 
>>>> have resubscribed many times. Is there a problem with my 
>>>> configuration? What can I do to fix this?
>>> 
>>> You need to stop rejecting mail from the list. That could be because 
>>> you've chose strict DMARC enforcement, which is incompatible with 
>>> most discussion mailing lists.
>> 
>> I am not using DMARC.
> 
> That makes the situation less obvious. Examine your logs to find the 
> rejections, which should give you a hint as to why they are happening.

I have taken a look at my logs:

This is the error:

Jun  9 12:03:41 sequoia postfix/smtpd[52759]: NOQUEUE: reject: RCPT from 
unknown[45.90.5.195]: 554 5.7.1 Client host rejected: cannot find your 
reverse hostname, [45.90.5.195]; 
from=<[email protected]> to=<[email protected]> 
proto=ESMTP helo=<list.sys4.de>

However, most of the of the time it lets, it through:

0.43, dsn=2.6.0, status=sent (250 2.6.0 <[email protected]> Message 
accepted for delivery)
Jun 14 06:35:36 sequoia postfix/qmgr[83260]: 4DC2D1F5A07: removed

I added:

[email protected]       OK

to sender_checks and this seems to have resolved this issue. I have to 
wonder if it is dns or what is causing this, because it only failed once 
in a while.


> 
> However, the other smtpd_*_restrictions lists may be involved, or there 
> may be other things in your config causing the issue.
> 
> For less uncertain analysis, it would help to have the full "postconf 
> -nf" output (listing explicitly set non-default configs) and the 
> relevant log lines reporting the failures.

alias_database = hash:/usr/local/etc/postfix/aliases
alias_maps = hash:/usr/local/etc/postfix/aliases
canonical_maps = hash:/usr/local/etc/postfix/canonical.sender
command_directory = /usr/local/sbin
compatibility_level = 3.7
daemon_directory = /usr/local/libexec/postfix
data_directory = /var/db/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd
     $daemon_directory/$process_name $process_id & sleep 5
disable_vrfy_command = yes
html_directory = /usr/local/share/doc/postfix
inet_interfaces = all
inet_protocols = all
mail_owner = postfix
mailbox_size_limit = 0
mailq_path = /usr/local/bin/mailq
manpage_directory = /usr/local/man
meta_directory = /usr/local/libexec/postfix
mydestination = localhost
mydomain = teisprint.com
myhostname = sequoia.teisprint.com
mynetworks = 127.0.0.0/8, 10.10.2.0/24
mynetworks_style = host
myorigin = $myhostname
newaliases_path = /usr/local/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/local/share/doc/postfix
sample_directory = /usr/local/etc/postfix
sender_canonical_maps = hash:/usr/local/etc/postfix/canonical.sender
sendmail_path = /usr/local/sbin/sendmail
setgid_group = maildrop
shlib_directory = /usr/local/lib/postfix
smtp_tls_CApath = /etc/ssl/certs
smtpd_hard_error_limit = 5
smtpd_helo_required = yes
     cidr:/usr/local/etc/postfix/client_checks, check_sender_access
     hash:/usr/local/etc/postfix/sender_checks, check_sender_access
     hash:/usr/local/etc/postfix/sender_access, 
reject_unknown_sender_domain,
     reject_unknown_reverse_client_hostname, 
reject_invalid_helo_hostname,
     reject_non_fqdn_helo_hostname, reject_non_fqdn_hostname,
     reject_non_fqdn_sender, reject_non_fqdn_recipient,
     reject_unknown_helo_hostname, 
reject_unknown_reverse_client_hostname,
     reject_unauth_pipelining, reject_invalid_hostname,
     reject_unauth_destination, reject_unknown_sender_domain,
     reject_unknown_recipient_domain, permit
strict_rfc821_envelopes = yes
unknown_client_reject_code = 554
unknown_local_recipient_reject_code = 550
virtual_alias_maps = 
mysql:/usr/local/etc/postfix/mysql-virtual-alias-maps.cf,
     mysql:/usr/local/etc/postfix/mysql-virtual-email2email.cf
virtual_gid_maps = static:2000
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains =
     mysql:/usr/local/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_mailbox_maps =
     mysql:/usr/local/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_minimum_uid = 500
virtual_transport = virtualprocmail:dummy
virtual_uid_maps = static:2000
virtualprocmail_destination_recipient_limit = 1

Is this best practices, what other changes should be made?

>> I don't forward any of my own emails anywhere, I really like to use 
>> pine email client on the server myself, but this is not for everyone. 
>> What is funny is everyone asked for webmail, but now that I have it 
>> working, everyone wants theirs forwarded. I think I am the only one 
>> using roundcube.
> 
> Feel good about getting Roundcube working, your users may one day find 
> it more attractive than forwarding to Yahoo or other behemoths. 
> Forwarding to any large mailbox provider is problematic if your users 
> are on discussion mailing lists like this one or if you fail to catch 
> spam before forwarding it. Over time the problems with forwarding have 
> only gotten worse.

Kind Regards,
Al
_______________________________________________
Postfix-users mailing list -- [email protected]
To unsubscribe send an email to [email protected]