E-mail accepted even if not present in virtusertable!

niente0 · 11-16-2015, 04:21 AM

Hi,
I use Sendmail, my local-host-names file is like this:

Code:

firstdomain.com
seconddomain.com

My virtusertable is like this:

Code:

user1@firstdomain.com     user1
@seconddomain.com     error:nouser User unknown

My problem is that when I write to user1@seconddomain.com the message does not return an error but is delivered to user1, even if user1@seconddomain.com is not present in virtusertable.

How can I solve it? Any suggestion?
Thank you

bathory · 11-16-2015, 05:48 AM

Hi,

My guess is that you didn't rebuild virtusertable. What gives

Code:

sendmail -bv user1@seconddomain.com

To rebuild virtusertable, you have to run:

Code:

makemap hash /etc/mail/virtusertable < /etc/mail/virtusertable

niente0 · 11-16-2015, 08:04 AM

Thank you for your answer.
Virtusertable is updated (I run makemap very often), and here's the result of sendmail -bv user1@seconddomain.com:

Code:

user1@seconddomain.com... deliverable: mailer local, user user1

It is a long time that I have this problem, I cannot find a solution. I guess it's something with some parameter in sendmail.mc...

Here'st my sendmail.mc, hoping it's useful. I'm running Centos v6.7, Sendmail 8.14.4, Dovecot v2.0.9, Procmail v3.22.

Quote:

divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
OSTYPE(`linux')dnl
define(`confDEF_USER_ID', ``8:12'')dnl
dnl define(`confAUTO_REBUILD')dnl
define(`confTO_CONNECT', `2m')dnl
define(`confTO_DATAINIT', `8m')dnl
define(`confTRY_NULL_MX_LIST', `True')dnl
define(`confDONT_PROBE_INTERFACES', `True')dnl
define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
define(`STATUS_FILE', `/var/log/mail/statistics')dnl
define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl
define(`confAUTH_OPTIONS', `A')dnl
define(`confMAXRCPTSPERMESSAGE', `30')dnl
define(`confMAX_MESSAGE_SIZE', `15000000')dnl
define(`confHELO_NAME', `mail.xxxxxxxx.com')dnl
define(`confMCI_CACHE_SIZE',`10')dnl
define(`confTO_RESOLVER_RETRY',`3')dnl
define(`confAUTH_OPTIONS', `A p')dnl
TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl
define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl
define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl
define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl
define(`confCLIENT_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl
define(`confCLIENT_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl
define(`confQUEUE_LA', `16')dnl
define(`confREFUSE_LA', `64')dnl
define(`confTO_IDENT', `0')dnl
FEATURE(`no_default_msa', `dnl')dnl
FEATURE(`smrsh', `/usr/sbin/smrsh')dnl
FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl
FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl
FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl
DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
FEATURE(`accept_unresolvable_domains')dnl
LOCAL_DOMAIN(`localhost.localdomain')dnl
MAILER(smtp)dnl
MAILER(procmail)dnl

Thanks again

bathory · 11-16-2015, 11:54 AM

Quote:

Virtusertable is updated (I run makemap very often)

You should run it every time you change virtusertable

Quote:

sendmail -bv user1@seconddomain.com:
user1@seconddomain.com... deliverable: mailer local, user user1

Doh, maybe the following is the problem

Quote:

define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl

I've never used it, so I don't know what it does really. You can disable it temporarily from sendmail.cf, by commenting out "O UserDatabaseSpec=/etc/mail/userdb" and see if it works.
If that doesn't work try to reverse the entries order in /etc/mail/virtusertable

Code:

@seconddomain.com     error:nouser User unknown
user1@firstdomain.com     user1

niente0 · 11-16-2015, 03:35 PM

Thank you very much for your suggestions.
I have no /etc/mail/userdb.db file, so I think it's a predefined (unused) setting left in sendmail.mc.

Anyway, I just discovered that I get this problem only when I send an e-mail message from another address that resides on the same server. While if I write an email to the non-existent address from an "outside" account, message is correctly refused (unknown user).

So this behavior is far less annoying after this discovery, I think I can live with this...

Thank you for your help!