Mail rate limit

Hi Guys

I have recently been informed that a couple of customers have been getting a error message whilst attempting to send an email via the usermin interface. The errors says something along the lines of can't send email as you have exceeded your quota (We have the Mail Rate Limiting set on the server) But it appears we are not having the issue with exceeding quotas with customers using mail clients to send mail even on the same domain. So it seems localised just to usermin.

Can you please let me know if you are aware of this type of issue, if not then I will attempt to provide better information to assist.

Please note we are also using authentic theme.

Thanks Michael



Howdy -- we haven't heard any reports regarding Usermin being an issue, but not other clients.

Just to verify, do you have Mail Rate Limiting installed/enabled within Virtualmin?

Also, what is the output of this command:

postconf -n

And if you have any other details, that'd be great too. Thanks!


Yes I installed rate limiting via virtualmin

Output of postconf -n

Command Shell

postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases allow_percent_hack = no append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix disable_vrfy_command = yes home_mailbox = Maildir/ mailbox_command = /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME mailbox_size_limit = 0 maximal_queue_lifetime = 2d message_size_limit = 30720000 milter_default_action = accept milter_protocol = 2 mydestination =,, , localhost myhostname = mynetworks = [::ffff:]/104 [::1]/128 myorigin = /etc/mailname non_smtpd_milters = local:/var/run/milter-greylist/milter-greylist.sock readme_directory = no recipient_delimiter = + sender_bcc_maps = hash:/etc/postfix/bcc sender_dependent_default_transport_maps = hash:/etc/postfix/dependent smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) smtpd_helo_required = yes smtpd_milters = local:/var/run/milter-greylist/milter-greylist.sock smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination check_policy_service inet: smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes virtual_alias_maps = hash:/etc/postfix/virtual

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I will try and get the exact error message for you soon.

Thanks Michael

I'd be interested to see the exact error message, as that would indicate if the mail rate limit is the cause, or just a lack of disk quota for the user.

Hi Jamie

Error is attached, First thing I looked at was the quotas and they were all ok.

Thanks Michael

What gets logged to /var/log/maillog or /var/log/mail.log when that error happens?

It should provide some more useful details from the mail server..