Problems with email not being sent when using DISCARD in access file.
Panic
only emails sent "To:" specific domains. If email is sent to specific
domains only, everything is fine. Now if I send and email with an
address that will get discarded, the email seems to get discarded even
for the valid addresses. The following is my access config:
Connect:localhost.localdomain RELAY
Connect:localhost RELAY
Connect:127.0.0.1 RELAY
To:com DISCARD
To:net DISCARD
To:org DISCARD
To:us DISCARD
To:testdomain.com OK
To:testdomain.net OK
To:testdomain2.com OK
In the mailllog with the above access config in place, I can see the
invalid addresses being discarded, but email to the valid address
never gets send to my smart host. Here is the mail command that I am
executing and the output of my mail session in maillog:
# date | mailx -s "Test from `uname -n`" s...@testdomain.com
k...@verizon.net k...@yahoo.com
Apr 12 12:47:47 testserver sendmail[21280]: p3CGllvp021280: from=root,
size=158, class=0, nrcpts=3,
msgid=<201104121647....@testserver.ny.testdomain.com>,
relay=root@localhost
Apr 12 12:47:47 testserver sendmail[21282]: p3CGllKZ021282:
ruleset=check_rcpt, arg1=<k...@verizon.net>, relay=localhost.localdomain
[127.0.0.1], discard
Apr 12 12:47:47 testserver sendmail[21282]: p3CGllKZ021282:
ruleset=check_rcpt, arg1=<k...@yahoo.com>, relay=localhost.localdomain
[127.0.0.1], discard
Apr 12 12:47:47 testserver sendmail[21282]: p3CGllKZ021282:
from=<ro...@testserver.ny.testdomain.com>, size=446, class=0, nrcpts=3,
msgid=<201104121647....@testserver.ny.testdomain.com>,
proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Apr 12 12:47:47 testserver sendmail[21282]: p3CGllKZ021282: discarded
Apr 12 12:47:47 testserver sendmail[21280]: p3CGllvp021280:
to=s...@testdomain.com,k...@verizon.net,k...@yahoo.com, ctladdr=root (0/0),
delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=90158,
relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (p3CGllKZ021282
Message accepted for delivery)
Now if I change the "DISCARD" lines to "REJECT" and regenerate the
access.db files and restart sendmail, and try sending a group email to
users that are valid and invalid, the emails are delivered to the
valid users. Here the tracking of the email when using "REJECT":
Apr 12 13:37:07 testserver sendmail[24132]: p3CHb0AP024132: from=root,
size=158, class=0, nrcpts=3,
msgid=<201104121737....@testserver.ny.testdomain.com>,
relay=root@localhost
Apr 12 13:37:09 testserver sendmail[24135]: p3CHb7k4024135:
ruleset=check_rcpt, arg1=<k...@verizon.net>, relay=localhost.localdomain
[127.0.0.1], reject=550 5.2.1 <k...@verizon.net>... Mailbox disabled for
this recipient
Apr 12 13:37:09 testserver sendmail[24135]: p3CHb7k4024135:
ruleset=check_rcpt, arg1=<k...@yahoo.com>, relay=localhost.localdomain
[127.0.0.1], reject=550 5.2.1 <k...@yahoo.com>... Mailbox disabled for
this recipient
Apr 12 13:37:09 testserver sendmail[24132]: p3CHb0AP024132:
to=k...@verizon.net, ctladdr=root (0/0), delay=00:00:09,
xdelay=00:00:02, mailer=relay, pri=90158, relay=[127.0.0.1]
[127.0.0.1], dsn=5.2.1, stat=User unknown
Apr 12 13:37:09 testserver sendmail[24132]: p3CHb0AP024132:
to=k...@yahoo.com, ctladdr=root (0/0), delay=00:00:09, xdelay=00:00:02,
mailer=relay, pri=90158, relay=[127.0.0.1] [127.0.0.1], dsn=5.2.1,
stat=User unknown
Apr 12 13:37:09 testserver sendmail[24135]: p3CHb7k4024135:
from=<ro...@testserver.ny.testdomain.com>, size=446, class=0, nrcpts=1,
msgid=<201104121737....@testserver.ny.testdomain.com>,
proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Apr 12 13:37:09 testserver sendmail[24132]: p3CHb0AP024132:
to=s...@testdomain.com, ctladdr=root (0/0), delay=00:00:09,
xdelay=00:00:02, mailer=relay, pri=90158, relay=[127.0.0.1]
[127.0.0.1], dsn=2.0.0, stat=Sent (p3CHb7k4024135 Message accepted for
delivery)
Apr 12 13:37:09 testserver sendmail[24132]: p3CHb0AP024132:
p3CHb0AQ024132: DSN: User unknown
Apr 12 13:37:09 testserver sendmail[24135]: p3CHb7k6024135: from=<>,
size=2783, class=0, nrcpts=1,
msgid=<201104121737....@testserver.ny.testdomain.com>,
proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Apr 12 13:37:09 testserver sendmail[24132]: p3CHb0AQ024132: to=root,
delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31182,
relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (p3CHb7k6024135
Message accepted for delivery)
Apr 12 13:37:10 testserver sendmail[24138]: p3CHb7k6024135:
to=s...@testdomain.com, delay=00:00:01, xdelay=00:00:00, mailer=relay,
pri=33010, relay=mailserver02.ny.testdomain.com. [10.10.10.151],
dsn=2.0.0, stat=Sent (p3CHbAvH023824 Message accepted for delivery)
Apr 12 13:37:10 testserver sendmail[24137]: p3CHb7k4024135:
to=<s...@testdomain.com>, ctladdr=<ro...@testserver.ny.testdomain.com>
(0/0), delay=00:00:03, xdelay=00:00:01, mailer=relay, pri=120446,
relay=mailserver01.ny.testdomain.com. [10.10.10.150], dsn=2.0.0,
stat=Sent (p3CHb9QE025030 Message accepted for delivery):
Sendmail sends out a rejection email notification, which in my case is
root, plus the email to s...@testdomain.com receives the email. Why
doesn't sendmail send email to valid users when one of the users is
being discarded? The following is the configuration of my sendmail.mc
file.
divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
OSTYPE(`linux')dnl
define(`SMART_HOST', `mailhost.testdomain.com')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
define(`STATUS_FILE', `/var/log/mail/statistics')dnl
DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
FEATURE(`relay_hosts_only')dnl
FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl
FEATURE(`blacklist_recipients')dnl
MASQUERADE_AS(`testdomain.com')dnl
FEATURE(`masquerade_envelope')dnl
FEATURE(`masquerade_entire_domain')dnl
MASQUERADE_DOMAIN(`testdomain.com')dnl
GENERICS_DOMAIN(`testdomain.com')dnl
FEATURE(`genericstable')dnl
MAILER(`local')dnl
MAILER(`smtp')dnl
Thank you in advance.
Claus Aßmann
> I'm having an issue with sendmail. I'm using the access file to allow
> only emails sent "To:" specific domains. If email is sent to specific
> domains only, everything is fine. Now if I send and email with an
> address that will get discarded, the email seems to get discarded even
> for the valid addresses. The following is my access config:
Hmm, yes. That's what the fine documentation says (cf/README):
DISCARD Discard the message completely using the
$#discard mailer. If it is used in check_compat,
it affects only the designated recipient, not
the whole message as it does in all other cases.
This should only be used if really necessary.