On Thursday, January 12, 2023 at 3:09:03 PM UTC-8 [email protected] wrote:
We've installed TRAC on a Linux (Ubuntu) server.
Everything runs fine, except for email notifications for ticket updates. 

We want to send the email notifications using our company Domino Server.
We are using TRAC on a Windows server for years now with the same (SMTP) 
configuration.

When I now submit a ticket change, I get the following error:
*2023-01-12 07:21:46,104 Trac[web_ui] ERROR: Failure sending notification 
on change to ticket #3: AttributeError: 'list' object has no attribute 
'update'*

I tried to google for this error, but no success. 
What can be the root cause of this issue?

With TELNET I can connect to the SMTP server:
sudo telnet <<domino server name>> 25

TRAC notification configuration (trac.ini):






*[notification]smtp_enabled = enabledsmtp_from_author = disabledsmtp_server 
= <<domino server name>>use_public_cc = disableduse_short_addr = 
disableduse_tls = disabled*

Apache configuration (trac.conf):


















*LoadModule ldap_module modules/mod_ldap.soLoadModule authnz_ldap_module 
modules/mod_authnz_ldap.soLDAPTrustedGlobalCert CA_BASE64 
"/home/trac_admin/Downloads/CS03.cer"WSGIScriptAlias /trac/es 
/var/www/html/trac/es/cgi-bin/trac.wsgi<Location /trac/es>  AuthType Basic  
AuthName "Apache LDAP ES authentication"  AuthBasicProvider file ldap  
AuthLDAPUrl "ldaps://<<installation specific>>?samAccountName?" "SSL"  
AuthLDAPBindDN " <<installation specific>>  "  AuthLDAPBindPassword 
<<hidden password>>  LDAPReferrals Off    AuthUserFile 
/var/lib/trac/global_pwd/trac.htpasswd  LogLevel debug  Require 
valid-user</Location>*

Which Trac version and do you have any plugins installed? 

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