It took a bit more than just setting pop3_uidl_format to get Microsoft [DELETED-Lookout-DELETED] Outlook to fully work with the email system [1] on the dedicated server. The customer could receive mail, but not send.
I'll spare you the details (namely because I want to spare myself the details) but to get Outlook to work with dovecot [2] and postfix [3].
In /etc/postfix/main.cf:
>
```
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
```
And in /etc/dovecot.conf:
>
```
ssl_disable = no
auth default {
mechanisms = plain digest-md5 cram-md5 login
passdb passwd-file {
args = /etc/dovecot-passwd
}
# and because once isn't enough ...
userdb passwd-file {
args = /etc/dovecot-passwd
}
socket listen {
client {
path = /var/spool/postfix/private/auth
mode = 0660
user = postfix
group = postfix
}
}
}
# and from yesterday ...
pop3_uidl_format = %08Xu%08Xv
```
Oh, and make sure saslauthd is running.