NDR for mistyped e-mail addresses
- Thread starter mabu
- Start date
NDR are sent from your internal mail server.
Take also a look into the deployment guide, chapter 'Receiver Verification'.
if you check the receivers with receiver verification, there are no unknown email addresses.
pls describe in an example what do you mean here.
I do not understand why you disabled but back to the quarantine question.
just use the admin web interface to query these emails. but I see no sense why you want to look after spam for non-existing users, this makes no sense to me - the main idea of a spam gateway is that you do not have to deal with spam.
Yes normally you are right it makes no sense to deal with spam.
But it is a claim that we should send an NDR in case that the customer has mistyped the email address.
I have setup the rules so that the most of the spam are blocked.
With web admin interface you mean the normal web administration interface for the configuration?
How can I query these emails in the web admin interface? When I look under Quarantine I see that there are spam but I can't search with wild cards for mistyped emails. e.g. *@mydomain.com
Thanks
Mabu
But it is a claim that we should send an NDR in case that the customer has mistyped the email address.
I have setup the rules so that the most of the spam are blocked.
With web admin interface you mean the normal web administration interface for the configuration?
How can I query these emails in the web admin interface? When I look under Quarantine I see that there are spam but I can't search with wild cards for mistyped emails. e.g. *@mydomain.com
Thanks
Mabu
yes, wildcards does not work. displaying all messages will break the system/web interface - as the results could be millions... - so you need to type the full email address.
I still not understand why don´t you use receiver verification, this is exactly what you want. or just quarantine emails from valid users (use LDAP group for that). analyzing and storing spam from non-existent users is just a waste of computing power.
Receiver Verification
- error message to senders if delivery failed (450)
- minimum traffic due to blocking on SMTP level
- configured in minutes
Yes with receiver verification I only get the valid emails and I save resources.
But in our case the problem for our customers is that when an customer mistype the email address e.g. user1@domain.com instead of user01@mydomain.com he do not get an NDR - Right? and the customer assuming that his email reach the user.
For this case I have create the rule "Unknown LDAP User" which move all emails which not rejected or there spam level are 10 and above into the quarantine.
Thanks
Manfred
But in our case the problem for our customers is that when an customer mistype the email address e.g. user1@domain.com instead of user01@mydomain.com he do not get an NDR - Right? and the customer assuming that his email reach the user.
For this case I have create the rule "Unknown LDAP User" which move all emails which not rejected or there spam level are 10 and above into the quarantine.
Thanks
Manfred
if you configure 450 (receiver verification), the sending mail server receives a temp. failure on smtp level - error 450 from your Proxmox Mail Gateway in case of non-existing email.
and therefore depending on their mail server settings their smtp server will try to deliver again (e.g. after 5 minutes). and after some time, their mail server will send a notification to the sender that the email is not delivered (a Delay Warning). so the sender knows that it is not delivered - a save configuration in my opinion.