How do I block

HCL Domino Domino Forum
1

How do I block email that is coming from the internet that is to address that are not in the address book.

Example

from johndoe@sjsjsjsj.com

to jdoe@home.com

Now lets say I have Jon.Doe@home.com in the address book as his address so it cant find a matching user named jdoe@home.com

So the message sits in my mail.box

I am getting hundreds of these like someone is trying to guess all the users email address in hoping to get their spam into our server. Its a paiin to have to go in and clean up the mail.box every few hours or so.

I have set different things in the config document but nothing seems to be help. I also after each change restart both the router and SMTP.

Thanks,

2

Subject: How do I block

Hey,

I think what you are looking to do is block specific mail before it settles in mail.box??

Below is a list of settings you can employ that will filter mail before it gets into your mail.box

DNS blacklist filtering

Inbound relay control and enforcement

Inbound intended recipient controls

Disabled SMTP routing to groups

Inbound connection controls

Inbound sender controls

The feature that might be of interest to you is Verifying that Local Domain recipients exist in the Domino Directory… if you set this feature to “Enable” ( located under config doc then under Inbound intended recipient controls) Domino 6.5.3… then any mail that your Domino server receives with a users name that does not exist in Name and Address book will be rejected ( should be rejected) … with a delivery failure report sent to the originator ( or Spammer) just remember that a spammer may use delivery failure reports against you… (Keep sending you random mail with random names until a they don’t receive anymore delivery failure reports from your server ; meaning that they could be hitting correct e-mail accounts)

Hope it helps

3

Subject: RE: How do I block

OK I have set the verify domain recipients exist in Domino dir. but still it acts like I didnt change anything. For instance this morning I had to clear out 7k in messages. I have done a fill domino restart as well as rebooted the server after the change. We are running 6.5.2FP1 as we had some issues with 6.5.3 and such with IMAP. Any help would be great as its a pain to clean out

4

Subject: RE: How do I block

FYI anytime you make changes to the config document type “Tell router update config”…

Check your messaging log (turn on to verbose if you need to) see if Domino is denying mail based on = rejected for policy reasons. Recipient could not be found in the Domino Directory. If for some reason there is still spam making it through then create some mail filtering rules to add another layer of protection… There is an option to delete any message that meets the criteria of your mail rules… (Use admin help to get u started)

Also you should be aware that your domino server or MTA box needs to be touching the internet and act as a SMTP firewall. Firewalls like Watchguard, Pics etc… that are Non MTA’s or Non messaging servers that have SMTP filtering and proxy capabilities can strip out some of the SMTP header information that might be necessary for filtering emails… this COULD be a reason why Domino may not filter e-mail correctly. MTA’s and mail messaging servers are specifically designed for handling SMTP messaging and should be set up as a firewall and touch the internet…

Danny

5

Subject: Search the Admin help file for “Verify that local domain recipients exist in the Domino Directory”

6

Subject: Re: How do I block

Untested, but you could try:

  1. Open mail.box

  2. File->Replication->Replication Settings

  3. Click on Space Savers

  4. Check “remove documents not modified in the last 3 days”

Then at least you wouldn’t have to manually clean them out.