While preparing this email for the mailing list I found the solution to
my problem. But I thought I'd still send it in case it may help someone
else.
tl;dr:
Use expansion format modifiers to normalize mail directories.
Problem:
Here's what I have under my virtual mail directory:
# cd /var/spool/vmail/
# ls -1
ECENTRYX.COM
TARGETMEISTER.COM
TargetMeister.com
ecentryx.com
targetmeister.com
# ls -1 targetmeister.com/
Clint
clint
Solution:
At first, I thought of symlinking all the different case combinations to
the all-lowercase directories. But that's a nasty hack. Then I thought
of adding all the different case combinations of email addresses in my
users table and map them to the lowercase destination. Again, another
nasty hack. So I thought I better check the man page. Sure enough, the
fix is easy: *expansion format modifiers*.
So I changed my config from:
accept from any for domain <domains> virtual <users> \
deliver to maildir "/var/spool/vmail/%{dest.domain}/%{dest.user}"
to:
accept from any for domain <domains> virtual <users> deliver to maildir \
"/var/spool/vmail/%{dest.domain:lowercase}/%{dest.user:lowercase|strip}"
No more directory pollution under my virtual mail tree. Problem solved!
What's crazy is that I had important emails in these "uppercase"
directories dating back almost a year. They were from my bank and
various vendors. So for the record, major US banks and some old-school
businesses like to uppercase email addresses.
For reference, here are all of my config files before the fix:
==========
# cat /etc/mail/mailname
mail.targetmeister.com
==========
# cat /etc/mail/smtpd.conf
table users "/etc/mail/users"
table passwd "/etc/mail/passwd"
table aliases "/etc/mail/aliases"
table domains "/etc/mail/domains"
pki tm certificate "/etc/ssl/mail.targetmeister.com.crt"
pki tm key "/etc/ssl/private/mail.targetmeister.com.key"
listen on localhost
listen on mail port smtp tls pki tm auth-optional <passwd>
listen on mail port submission tls-require pki tm auth <passwd>
accept from local for local alias <aliases> deliver to mbox
accept from any for domain <domains> virtual <users> \
deliver to maildir "/var/spool/vmail/%{dest.domain}/%{dest.user}"
accept from local for any relay
==========
# cat /etc/mail/domains
ecentryx.com
targetmeister.com
========== [obscured sample]
# cat /etc/mail/users
# The Dovecot IMAP server runs as vmail. It manages access to all mail
and is
# the final delivery destination.
### ECENTRYX.COM ###
[email protected] vmail
[email protected] [email protected]
### TARGETMEISTER.COM ###
[email protected] vmail
[email protected] [email protected]
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