Hello everybody. I've been using DirectAdmin custombuild for years (since 2008 I believe), and I've learned a lot reading this forum over the years. But now I had to register because I'm running into an issue that I can't seem to find a solution to, so I decided to ask for your help:
I've installed Mailman (because of Majordomo's trouble with Yahoo's DMARC), following this guide, on my VPS running CentOS 6.6 and DA 1.46.3. I had to configure mailman without suexec, like Yoshua, excepted I had to indicate the user name that goes with my mailing lists' domain name instead of "apache".
The issue I'm having now is with authentication in Exim, not sure whether it's Mailman- or Exim-related: Whenever I send a message to one of my Mailman list, I get H=localhost (my_server's_rDNS_name) [::1] F=<list_name-bounces@list's_domain_name> rejected RCPT <list_member's_mail_address (not local)>: authentication required in my Exim logs. Only local list members get the messages.
The only workaround I found so far is adding list_name-bounces@list's_domain_name to Exim's whitelist_senders file (I'm using SpamBlocker 4.2.2 for exim.conf). But I feel this it not a secure way to go, because these whitelisted adresses can be spoofed, so I'd like to find the real cause and solution to this authentication issue. I'm certainly missing something in Exim's configuration, but I can't see what. Any ideas?
Thanks a lot in advance.