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-   -   Problem with 'CC' & 'BCC' email not being delivered. (http://www.howtoforge.com/forums/showthread.php?t=5396)

snowfly 7th July 2006 04:44

Problem with 'CC' & 'BCC' email not being delivered.
 
Hi,

I've got a problem with my mail server in that any 'CC' or 'BCC' email is not being delivered.

The sever is running virtual mail setup with:
- Debian Sarge
- 2.4.27 smp kernel
- courier 0.47-4 courier-pop, courier-imap, courier-authmysql
- postfix 2.1.5-0 postfix-mysql, postfix-tls
- maildrop 1.6.3, maildropmysql
- spamassassin
- clamav 0.88.2
- amavisd

Basically, if someone sends an email (from anywhere) to an email address on my server, and also CC or BCC an email address on my server, it gets delivered to the person in "To:", but not to "CC" and "BCC.

Eg: Consider the following 3 people
- PersonA with an external address: persona@gmail.com
- PersonB with address on my server: a@myserver.co.nz
- PersonC with address on my server: b@myserver.co.nz

Suppose PersonA sends the following email:
To: a@myserver.co.nz
CC: b@myserver.co.nz
Subject: foobar
Message: test

a@myserver.co.nz receives the email successfully in their inbox.
However b@myserver.co.nz doesn't, nothing arrives, seems the CC email disapears.

I get the following extract in my mail log:
Code:

Jul  7 14:12:10 aqua postfix/qmgr[31036]: 44C6554EAA: from=<persona@gmail.com>, size=3280, nrcpt=2 (queue active)
Jul  7 14:12:10 aqua amavis[8578]: (08578-04) ESMTP::10024 /var/amavis/tmp/amavis-20060707T140450-08578: <persona@gmail.com> -> <a@myserver.co.nz>,<b@myserver.co.nz> Received: SIZE=3280 from aqua.xxx.co.nz ([127.0.0.1]) by localhost (aqua [127.0.0.1]) (amavisd-n
ew, port 10024) with ESMTP id 08578-04; Fri,  7 Jul 2006 14:12:10 +1200 (NZST)
Jul  7 14:12:10 aqua amavis[8578]: (08578-04) Checking: <persona@gmail.com> -> <a@myserver.co.nz>,<b@myserver.co.nz>
Jul  7 14:12:11 aqua amavis[8578]: (08578-04) spam_scan: hits=0.087 tests=HTML_40_50,HTML_MESSAGE
Jul  7 14:12:11 aqua amavis[8578]: (08578-04) FWD via SMTP: [127.0.0.1]:10025 <persona@gmail.com> -> <a@myserver.co.nz>,<b@myserver.co.nz>
Jul  7 14:12:11 aqua amavis[8578]: (08578-04) Passed, <persona@gmail.com> -> <a@mysever.co.nz>,<b@myserver.co.nz>, Message-ID: <0
01f01c6a16a$c5c1de20$4503a8c0@Mike>, Hits: 0.087
Jul  7 14:12:11 aqua postfix/smtp[8931]: 44C6554EAA: to=<a@myserver.co.nz>, relay=127.0.0.1[127.0.0.1], delay=1, status=sent (250 2.6.
0 Ok, id=08578-04, from MTA: 250 Ok: queued as 17E4454EB6)
Jul  7 14:12:11 aqua postfix/smtp[8931]: 44C6554EAA: to=<b@myserver.co.nz>, relay=127.0.0.1[127.0.0.1], delay=1, status=sent (250 2.6
.0 Ok, id=08578-04, from MTA: 250 Ok: queued as 17E4454EB6)
Jul  7 14:12:11 aqua postfix/qmgr[31036]: 44C6554EAA: removed
Jul  7 14:12:11 aqua postfix/pipe[8936]: 17E4454EB6: to=<a@myserver.co.nz>, relay=virtual, delay=0, status=sent (xxxxx.co.nz)
Jul  7 14:12:11 aqua postfix/pipe[8936]: 17E4454EB6: to=<b@myserver.co.nz>, relay=virtual, delay=0, status=sent (xxxxx.co.nz)
Jul  7 14:12:11 aqua postfix/qmgr[31036]: 17E4454EB6: removed


Its the same with CC and BCC emails, and the same if the sender address is from an external address, or an internal address on my server.

Anyone experienced this, or something similar where CC/BCC emails don't get delivered?

One thing to note, is that if an email like the following is sent (internal user sends to external user, and CC's to internal user), then it works fine:
From: a@myserver.co.nz
To: persona@gmail.com
CC: b@myserver.co.nz
Subject: foobar
...

falko 8th July 2006 11:52

But the mails have been sent:
Quote:

Jul 7 14:12:11 aqua postfix/pipe[8936]: 17E4454EB6: to=<a@myserver.co.nz>, relay=virtual, delay=0, status=sent (ramsu.co.nz)
Jul 7 14:12:11 aqua postfix/pipe[8936]: 17E4454EB6: to=<b@myserver.co.nz>, relay=virtual, delay=0, status=sent (ramsu.co.nz)
Does b@myserver.co.nz maybe point to the same mailbox as a@myserver.co.nz?

snowfly 9th July 2006 04:36

Quote:

Originally Posted by falko
But the mails have been sent:

Does b@myserver.co.nz maybe point to the same mailbox as a@myserver.co.nz?

No, they are completely seperate mailboxes.

I just did another test, and it seems its not just CC/BCC mail, its any mail delivered to 2 or more mailboxes on my server.

Eg, if persona@gmail.com sent an email with headers: To: <a@mysever.co.nz>, <b@myserver.co.nz>
Then only a@myserver.co.nz receives the mail, not b@myserver

Its weird that in the 1-2 years I've had this server running, I never even noticed this fault!! Bugger!
So any email sent to more than 1 person on my server, only the first person received it, no one else.

Its weird cause in the log, the emails have the same ID, eg: 17E4454EB6

falko 10th July 2006 08:50

Have you checked your Postfix transport rules, aliases, etc.?

snowfly 11th July 2006 03:36

Quote:

Originally Posted by falko
Have you checked your Postfix transport rules, aliases, etc.?

Hi, ok here is my postfix config:

transport.cf:
Code:

user = postfix
password = ********
dbname = xxxxx
table = email_domains
select_field = transport
where_field = domain
hosts = 127.0.0.1

aliases.cf:
Code:

user = postfix
password = *******
dbname = xxxxx
table = email_addresses
select_field = maildir
where_field = email
hosts = 127.0.0.1

remote_aliases.cf:
Code:

user = postfix
password = *********
dbname = xxxxx
table = email_aliases
select_field = remote_address
where_field = email
hosts = 127.0.0.1

And here's the end of my main.cf file:
Code:

myhostname = aqua.xxxxx.co.nz
myorigin = /etc/mailname
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
program_directory = /usr/lib/postfix
mydestination = mail.xxxxx.co.nz, aqua.xxxxx.co.nz, aqua, mail.xxxxx.co.nz
relayhost =

transport_maps = mysql:/etc/postfix/transport.cf
virtual_mailbox_base = /
virtual_uid_maps = static:1001
virtual_gid_maps = static:1001
virtual_mailbox_maps = mysql:/etc/postfix/aliases.cf
virtual_maps = mysql:/etc/postfix/remote_aliases.cf

qmgr_message_active_limit = 100
qmgr_message_recipient_limit = 100

content_filter = smtp-amavis:[127.0.0.1]:10024

message_size_limit = 51200000
unknown_local_recipient_reject_code = 450

smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes

Can you see anything wrong with my config, or anything that might suggest why emails aren't being delivered to the 2nd, 3rd... addressed users when sent to multiple users?

I can provide more of the main.cf file, or other files, just let me know what parts.

Thanks, Mike

falko 12th July 2006 12:42

Quote:

Originally Posted by snowfly
Can you see anything wrong with my config, or anything that might suggest why emails aren't being delivered to the 2nd, 3rd... addressed users when sent to multiple users?

I can provide more of the main.cf file, or other files, just let me know what parts.

Ok, you have all your data in a MySQL database, so you should check the MySQL database if there's some problem with the data (aliases, transports, etc.) that causes your problem.

snowfly 18th July 2006 04:39

Quote:

Originally Posted by falko
Ok, you have all your data in a MySQL database, so you should check the MySQL database if there's some problem with the data (aliases, transports, etc.) that causes your problem.

The MySQL database seems fine. All of the data seems fine, and if manually run queries based on those that postfix is using (to get transport, aliases, and remote_aliases, they all return data ok.

And as the mail server has been handling email perfectly ok for 1 person in the "to" field, then the database seems to be fine.

Maybe its something else?
Amavis, or maildrop?

snowfly 19th July 2006 05:58

Ok, finally found a part solution!!!

Seems other people have had this problem too.

In the maildrop README.postfix file, I found this:

Quote:

Postfix, by default, will send messages to multiple recipients at a time.

Maildrop assumes that it will be receiving messages for one recipient at a
time.

When postfix hands maildrop a message with multiple recipients, only the
first recipient receives the mail.


If maildrop is configured as a transport named "maildrop" in postfix
(which would be the normal way to do it), adding:

maildrop_destination_recipient_limit = 1

to /etc/postfix/main.cf fixes this behaviour, and causes postfix to hand
messages one recipient at a time to maildrop.
Ok, so I added the "maildrop_destination_recipient_limit = 1" line to my postfix main.cf file.
Then reloaded postfix, tested by sending email with multiple recipients, and it didn't work.

So I tried something different, turning off content filtering (spam/virus filtering with clamav, spamassassin, via amavisd).
I did this by commenting out this line in main.cf:

Code:

#content_filter = smtp-amavis:[127.0.0.1]:10024
Then reloaded again, tested, and YAY it worked! It was correctly delivering to all recipients!!!

So, why I wonder does it not work when the "content_filter" is turned on?
Only when its off?

Thats the next thing I'll have to find out.
I can't leave the content-filter off, as its removes on average 500 spam and 10 virus emails every day!

Mike

falko 19th July 2006 12:35

What's in /etc/amavis/amavisd.conf?

snowfly 19th July 2006 12:51

Quote:

Originally Posted by falko
What's in /etc/amavis/amavisd.conf?

Well after further testing, I found that in fact 99% of mail is now working correctly! With content-filter turned on.

The only thing that isn't working with 'content-filter' on, is if I send an email like the following:
From: external address
To: persona@myserver.co.nz
CC: persona@myserver.co.nz

Eg, if I send an email to the same person, in 'To', and 'CC'. Or the same person in 'To' twice.
Or if I send to persona@myserver.co.nz and an alias (eg foobar@myserver.co.nz) that forwards to the same address, persona@xxxxx.co.nz

But I'm thinking thats how mail servers are supposed to work?
If an email is addressed to the same person more than once, it only delivers it once.

That was were I was getting the problem above, i was sending email to myself, and an alias to myself.

All other mail now works fine!!
So the amavisd content filter is working.

Thanks falko for your assistance!

Hopefully this helps someone else, if they have the same issue.


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