Hello, I installed a new server this week. I followed perfect and everything works fine. I created a webaccount and an emailaccount. Sending emails with outlook is okay. But receiving not. /var/log/auth.log gives me this error: Code: Apr 2 18:49:41 h778760 saslauthd: do_auth : auth failure: [email@example.com] [service=imap] [realm=] [mech=shadow] [reason=Unknown] I thinked it was the pam authentification so I reconfigured /etc/default/saslauthd to use the shadow method. But still auth problem. Code: myhostname:~# testsaslauthd -u web1_myaccount -p mypassword -f /var/spool/postfix/var/run/saslauthd/mux gives me that: Code: 0: OK "Success." But when I try: Code: testsaslauthd -u firstname.lastname@example.org -p mypassword -f /var/spool/postfix/var/run/saslauthd/mux I get: Code: 0: NO "authentication failed" So is the domain extension is the problem? I hope it isn't a big problem. Thx for help.