May 23, 2016, 5:17 AM
5 Posts
topic has been resolvedResolved

Domino User Address not found SMTP

  • Category: Domino Server
  • Platform: Windows
  • Release: 9.0.1
  • Role:
  • Tags: address lookup,smtp
  • Replies: 4


we recently changed the address lookup from "Fullname then Local Part" to "Fullname only". It works so far but we have an issue with specific users with one specific last name.

Our Mail address is defined as "".
The problem  users have the same last name as our Domino Domain.

Example when I now try to address the users via smtp:
250 Recipient OK
550 No such user


I verified multiple times if the adrdess exists in the names.nsf.
So I only assume that the same domino domain and user lastname is the problem

Does anybody can help with that?
KR David

May 23, 2016, 5:33 AM
105 Posts

You need to apply the notes.ini variable SMTP_LEFT_DOT_NEVER_DOMAIN=1

May 23, 2016, 12:25 PM
122 Posts
Re: Domino User Address not found SMTP
Hello David!

Just complementing the information provided by D Porter.

In fact the issue is not related with address name containing the domain name.
The issue is related with Domino domain separator.
See the information from the following document:

Specifies the character that used to separate Domino domains in the sender's Internet address.
The separator character selected determines the Domino domain(s) position field whereas that can be used.

Choose one:
% - percent sign - (default) - Select this option only if you selected Left of '@' in the Domino domain(s) position field.
. - period - Select this option for use with either value in the Domino domain(s) position field.

Note: Do not use the period as the separator character when the Domino domain(s) position is set to Left of '@' and either of the following variables is set in the server's NOTES.INI file: SMTP_LEFT_DOT_NEVER_DOMAIN=1 or SMTP_REPLACE_DOTS_OFF=1. These variables prevent the server from considering a period (.) in an inbound address as a Domino domain separator. For example, in the address, the server will be unable to interpret Sales as the name of a Domino domain.

> Using a Global Domain document to set up a server to receive mail for multiple Internet domains!/SSKTMJ_9.0.1/admin/conf_settingupaservertoreceivemailformultipleinternet_t.dita

I hope it helps!

Best Regards!

Rodrigo San Vicente

May 24, 2016, 4:00 AM
5 Posts
Domino User Address not found SMTP


at first thank you both for the very fast respond.

I tried at first the option from D Porter and it didn't work.

I also changed the domain seperator to % and after a server reboot the problem was solved.


May 25, 2016, 3:51 AM
5 Posts
Domino User Address not found SMTP