Hello people,
Does anyone know how to configure the time before a mail is returned as a non delivery failure?? We are receiving emails to users no longer in our mail domain but it takes 3 days before they are returned to the sender as failed.
TIA
Frankie
Subject: Returning NDR
Not sure I understand this.
If you have the server configuation field “Verify that local domain recipients exist in the Domino Directory:” disabled, then when a mail is placed on mail.box by the SMTP listener for a non-existent user, the router should generate a non delivery report immediately. If this NDR takes a long time to route back to the apparent sender or just dies in mail.box then evidently the sender did not expect a reply (possible spam indicator).
Better, if you have the server configuation field “Verify that local domain recipients exist in the Domino Directory:” enabled, then the SMTP listener will not accept undeliverable messages at all but will bounce them during the SMTP handshake with 550 no such user.
Subject: RE: Returning NDR
Thank you for your response.The undeliverable messages do bounce back to the sender but are taking 3 days at the moment. We did not have the field enabled but it is now although it does not appear to have changed anything when I have tested it - the mail for the unknown user in our domain that I have sent is still in the mail.box. Does it only run at certain times??
Subject: RE: Returning NDR
Once you set “Verify that local domain recipients exist in the Domino Directory:”, this will only work for new messages as it applies to the SMTP listener, not the mail router. Any undeliverable mail that is still in mail.box is unaffected.
Also you need to wait for the new setting to take effect or issue “tell smtp update” at the server console to force it.
Simplest way to test it would be to send from some external mail account (say a hotmail or yahoo account) a mail to garbage@yourdomain.
You should very quickly see a message in your hotmail/yahoo/whatever inbox saying “unable to deliver…” or some such.
Subject: RE: Returning NDR
With this config option set to ENABLED on SMTP,I haven’t seen any response sent to the outside mail address sender about being unable to deliver. It seems to just drop it altogether.
Update: I have since found that Some web based mail systems will show a rejection, but others evidently don’t route such messages to the original source user.
Subject: RE: Returning NDR
Christopher,Thank you for the pointing out of this setting. It does take an tell smtp update or just restart the smtp task (tell smtp quit l smtp).
But it works.
Cheers
Subject: Returning NDR
As i know it only depends on the dblookup true all configured NAB’s while router is serving the message. This takes just up to approx. 2sec.Try to optimize your mail routing and smtp configuration…seems that your email is running in a bouncing mail status out thrue the internet.
Subject: Returning NDR
send a mail to this user with full delivery trace enabled and you can see the routing steps of the message