I am seeing a very strange effect. I documented it from the command line
below.
I am running on an embedded system. What we are trying to do is whitelist
a very short list of recipients.
I am trying to set up some header and address verification checks, and
will soon have written about that in another thread. In order to simplify
THAT (delivery) problem, I removed the verification and check from the
pipeline. However, the sender access check just wouldn't go away!
So I removed the .db file and text file it is generated from.
It seems that postmap re-creates the .db *AND TEXT* files (after
expressing some unhappiness) every time there is a mail delivery attempt!
Note: In the process of trying to debug this, I ran across the "verify
database" docs. Given that the list of recipients is short, I have turned
that off. (But not until AFTER I started seeing the phenomenon below.)
$ grep address main.cf
address_verify_map=
I am tempted to consider this:
a) the effect of media corruption--in fact, just here seeking confirmation
that this is an unknown phenomenon--but it has persisted across numerous
postfix reloads, restarts and even a reboot.
The other possibility is:
b) postmap is recreating the files based on some (possible corrupted)
cached database somewhere, and it is some kind of BerkeleyDB bug, but I
can't track that down (despite much googling) if it is the case. The
mystery here is that it also recreates the text file!
Any ideas? Anybody ever seen this before? I have googled it, but to no
avail.
Thanks,
Dave
This shows the files re-appearing, a log watch while attempting to deliver
mail, and the build info for postmap.
1)
* The db file AND text file exist and are removed
$ ls -l sender_access2*
-rw-r--r-- 1 root root 84 Feb 13 17:21 sender_access2
-rw-r--r-- 1 root root 12288 Feb 13 17:21 sender_access2.db
$ rm -f sender_access2*
$ ls -l sender_access2*
ls: sender_access2*: No such file or directory
2)
* There is no mention of them in main.cf
$ grep sender_access2 main.cf
3)
* This is what is running
$ ps -edalf | grep postfix
4901 postfix pickup -l -t fifo -u -o
receive_override_options=no_header_body_checks
14549 root grep postfix
15597 root /usr/libexec/postfix/master
15609 postfix qmgr -l -t fifo -u
16057 postfix tlsmgr -l -t unix -u
4)
**
* after attempting to receive an email,
* THE FILES HAVE RE-APPEARED
**
$ ls -l sender_access2*
-rw-r--r-- 1 root root 111 Feb 14 08:47 sender_access2
-rw-r--r-- 1 root root 12288 Feb 14 08:47 sender_access2.db
5)
***
* This is what I saw when I watched a log tail.
* I believe there is a message for each "postmap" spawned and the number
of duplicates increases by one for
* each daemon. It is preceded by messages to the effect that the file is
missing.
***
Every 5s: grep postfix /var/log/messages
2014-02-14 08:47:21
Feb 14 08:47:11 P1234567 mail.warn postfix/postmap[16487]: warning:
/etc/postfix/sender_access2.db: duplicate entry: "[email protected]"
Feb 14 08:47:13 P1234567 mail.warn postfix/postmap[16499]: warning:
/etc/postfix/sender_access2.db: duplicate entry: "[email protected]"
^C
$
* This is the build info for postmap:
$ postmap -sv hash:/etc/postfix/sender_access2
postmap: name_mask: ipv4
postmap: inet_addr_local: configured 4 IPv4 addresses
postmap: Compiled against Berkeley DB: 4.4.20?
postmap: Run-time linked against Berkeley DB: 4.4.20?
postmap: dict_open: hash:/etc/postfix/sender_access2
[list of addresses]
