Server :: Postfix: Explicitly Permit "joeblow@mydomain" From Certain Address Ranges?
Jan 4, 2011
One of our clients uses a mobile client, which "helo"s with a non-resolvable hostname (which contains the correct IPv4 address in the name but does not resolve). I'd like to be able to config PERMIT "joeblow@mydomain" when the helo-names "*.mobilepool.carrier.net". Can anybody give me a hint how to do this, if it is even possible?Right now it just rejects based on not resolving the HELO name.
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Sep 19, 2010
I've googled til my brain went boom... So the short story goes; I have lots of ip address ranges in multiple files which need to go into an iptables firewall... Sounds simple right?
Example of files:
1.0.1.0-1.0.1.255
1.0.1.0-1.1.0.255
[code]....
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Sep 8, 2009
I am trying to remember the procedure used to determine the ip address range when given a network address and its subnet mask. Does anyone have any documentation on the steps that are done to accomplish this?
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Jun 30, 2010
I have create distro groups in zimbra and have add member sin there. when i connect an account on mapi etc. [URL] i have create a persona in order client to send from [URL] rather than [URL] How can i restrict inside postfix to relay using [URL]?
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Dec 27, 2010
I need to have a postfix server to rewrite the sender's address. For example, if the sender is: [URL], then the recipient would receive all emails from [URL] as [URL]. I tried using the generic file and created a table out of it, but this did not work:
postmap /etc/postfix/generic
-rw-r--r-- 1 root root 9977 Dec 27 15:24 generic
-rw-r--r-- 1 root root 12288 Dec 27 15:25 generic.db
I added this line to the generic text file:
[code]....
I am running two boxes with postfix 2.3.3. and 2.1.1 respectively. Both need this configuration. I also added this line:
smtp_generic_maps = hash:/etc/postfix/generic
on the main.cf file. However, this did not work. The one running postfix 2.3.3 is on Centos 5.5, the other one is on SuSe Enterprise 9.
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Feb 7, 2010
using samba-3.4.5.I am trying for join samba server[on linux] to domain controller[windows2003], with security=domain in smb.conf. net rpc join -U Administrator%MyPassword But it fails with following debug messages.
rpccli_netlogon_set_trust_password: unable to setup creds (NT_STATUS_ACCESS_DENIED) !
rpc command function failed ! (NT_STATUS_ACCESS_DENIED)
get_schannel_session_key: could not fetch trust account password for domain 'MYDOMAIN'
net_rpc_join_ok: failed to get schannel session key for server MYSERVER for domain MYDOMAIN. Error was NT_STATUS_CANT_ACCESS_DOMAIN_INFO.
unable to join domain MYDOMAIN
return code = -1.
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Jun 21, 2011
I have set up a couple of postfix servers for my domains, but the only thing I am missing now is this: How to block the public sending mail from my email to my email? I have managed it with SPF, but surely there must be a better way, that returns "relay not allowed" to the client. The SPF method costs too much, since it must make a dns request for each mail. So far, I have not gotten many of these mails, unless when testing my mailserver, but as I see it, anyone should not be allowed to send mail from abuse@mydomain.com to abuse@mydomain.com.
Somebody must have thought about this a long time ago, and there is simply that little line in main.conf that I'm missing.. My setup is this (virtual): I have a primary mx, with postfix, courier IMAP/POP3 server, a user database, and sasl via saslauthd. I also have a secondary mail server (backup mx) with no sasl auth, but with a copy of the mail users in the virtual tables, but added as relay_* users instead.
Spamassassin and SPF testing is replicated too, so most of the stuff should work, but I simply cannot find a setting in Postfix that denies someone to mail FROM my address TO my address. When mailing from my address and out in the open, they are required to authenticate, but not when using one of my my domain addresses, and also targeting my domain addresses.
As said, It is possible with a strict SPF setting, but that is at a cost for every lookup. It would be quicker for postfix to lookup the sender and the recipient in the relay/virtual tables, and deny if both addresses were in the recipient tables, and sender is not authenticated.
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Jan 2, 2010
This is a transcript I get emailed at least once every day, usually about 3 to 10 a day recently.
Transcript of session follows.
SMTP server: errors from unknown[ip address]
<boring stuff snipped>
In: RCPT TO: <server@my domain>
Out: 550 5.1.1 <server@my domain>: Recipient address rejected: User unknown in local recipient table
Session aborted, reason: lost connection Now I cannot seem to find anything via Google, as when I put "server@" anywhere in the string, I just get web hosting or other kroomst. The emails usually come from legit places, usually hotels. Does this mean they are sending bad emails, i.e. they have a Trojan/worm, or is this a live hack attempt?. I believe the later, as I might get upto 3 domains from the one ip address, which is always, NOT associated with the listed domain. Not causing me any issues, except I have been getting a lot recently.
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May 24, 2010
I'm trying to figure out how to access the local part and the domain part of an email address in postfix's main.cf. For example, myname@mydomain.net has myname as the local part and mydomain.net as the domain part.I get the whole email address with %s. I want to speed up the lookups by writing better database queries.I've had no luck finding this in the otherwise well documented postfix.
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Mar 23, 2011
Is there a command to explicitly park the heads of a particular hard drive?
I have a hot swap tray and want to issue commands to sync and park heads before removal.
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Sep 25, 2010
is there any HOWTO for configuring Webmin Postfix server with multiple postfix virtual hosts? Seems to be a tough challenge to set it up without any easy manual..
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Oct 4, 2010
so i set out to change the default smtp port the server uses because my ISP blocks port 25 and i need the email to work in outlook. this morning i could receive email, but not send it. so i did some research and thought that i needed to edit the master.cf file in /etc/postfix/ by commenting out this line: smtp inet n - n - - smtpd -oand replace it with587 inet n - n - - smtpd (587 being the port i want to use)somewhere along the lines postfix server stopped running and now i cannot get it to start.if i try using SSH it crashes immediately and if i restart it in simple control panel nothing happens
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Feb 25, 2011
I recently moved over user from an old box running postfix(v 2.0.16) over to rhel 6 running postfix (v mail_version = 2.6.6). ive tried to make sure all the files are of correct permissions and that the main.cf file is configured corectly. However there is something wrong as when i run postfix: service postfix server i get no error but when checking the status:service postfix status i get: master dead but pid file exists Looking into /var/log/mailog i find this line being the issue:
Feb 25 16:24:39 puny1 postfix/master[3517]: fatal: fifo_listen: create fifo public/pickup: Permission denied
I gather this is a file permission issue and ive tried to make sure the public folder in /var/spool/postfix is correctly set but still no avail.
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Dec 28, 2010
tell postfix to send email sent to one email address to another email address. What I really need to do is tell postfix that every email sent to [URL] and [URL] be sent to [URL] I tried transport maps like this: [URL] but that did not work. I then tried canonical maps like this:
recipient_canonical file:
/^((dbsupport|helpdesk).*)thisdomain[.]com$/ admins@thatdomain.com
sender_canonical file:
/^(.*@).*thisdomain[.]com$/ ${1}thatdomain.com
but it did not work either. I am really exhausted and I need to find a solution for this one since it is my boss asking me to get this working. This is what if in /var/log/mail in box1:
Dec 28 16:10:25 box1 postfix/pickup[19291]: 54D258F726: uid=0 from=<root>
Dec 28 16:10:25 box1 postfix/cleanup[23489]: 54D258F726: message-id=<4D1A5241.mailIBZ11LRR6@box1.thisdomain.com>
[code]....
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Mar 24, 2011
There is a mail server formed by debian4 + postfix 2.3.8 . Some messages aren't received or take too loong to be received. Here is a example or error in mail.log:
Code:
Mar 24 10:30:42 myserver postfix/smtpd[7467]: NOQUEUE: reject: RCPT from n7b.bullet.mail.re1.yahoo.com[69.147.103.218]: 450 4.1.7 <sentto-733423426-11-134235567-myname=mydomain.com@returns.groups.yahoo.com>: Sender address rejected: unverified address: Address verification in progress; from=<sentto-733423426-11-134235567-myname=mydomain.com@returns.groups.yahoo.com> to=<myname@mydomain.com> proto=SMTP helo=<n7b.bullet.mail.re1.yahoo.com>
[Code]...
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Jan 30, 2010
Working on ubuntu server for 1st time and need to create a new email address.The server has postfix
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May 17, 2011
Very new to Ubuntu and Linux so this may be a simple one. I've recently setup an Ubuntu Server 10.04 box as a mail relay running Postfix and Amavisd-new (Spamassassin & ClamAV) and this has been working really well. I started to get a few emails through today with the following header[URL]..(removed domain name) The name's always in quotes and random. The fqdn is that which I configured in postfix as $myhostname. I can't figure out how this address is being used. This box is only used for incoming mail and acts as a relay to Exchange. Exchange doesn't send out through it. The only thing that may be going outwards is bounced messages from Exchange which are almost exclusively to linkedin.
The fqdn isn't public. This box isn't even part of our internal domain, it's just named that way with manual DNS added. Anyone seen this before? Will this header have been part of the message when it arrives at postfix or could this have been added by postfix itself?
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May 21, 2009
I have an email server configured with postfix, dovecot, saslauthd and squirrelmail. It works great. In fact I'd even say it works too well: in squirrelmail, I can configure any sender address and my server will accept it. Message will be sent, wether the sender's address is [URL] or [URL]. Is there any way of limiting it in such way that only [URL] is accepted as sender's address?
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Oct 7, 2010
Im running Ubuntu server 10.04 lts
Im trying to get postfix to receive mail from one address and pipe it to a PHP file for a help desk software called Trellis Desk.
They recommended that I use Cpanel but its not free and my boss is not willing to pay for it. I need a free solution.
I know my way around Linux but Im no professional
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Sep 8, 2010
I setup a virtual server with these configurations:
1. Mail server: POSTFIX / DOVECOT
2. Webmin / Virtualmin
I am getting email to desired folders locally but I am not getting email from outside to desired users. Emails are bounced back with message "Address not found in virtual alias table".
Recent log errors are:
Sep 8 04:25:49 server1 postfix/smtpd[28002]: cannot load Certificate Authority data
Sep 8 04:25:49 server1 postfix/smtpd[28002]: warning: TLS library problem: 28002:error:02001002:system library:fopen:No such file or directory:bss_file.c:122:fopen('/etc/pki/postfix/root.crt','r'):
[code].....
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Mar 8, 2010
I am trying to configure virtual alias using regular expression.
For example :
Email send to user.1@example.com and user.2@example.com will deliver to user mailbox.
Email send to user2.1@example.com and user2.2@example.com will deliver to user2 mailbox.
And the numbers or alphabet in between user name and the domain will be vary , I can't just do a normal alias.
I been try to play around with main.cf and the virtual alias table but still not able to get work. So I am not sure is the main.cf didnt configure correctly or the regular expression is not working.
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Feb 8, 2010
I've set up an email server as per this howto: [url]
In a nutshell, it uses a combinatio of postfix, dovecot, amavis (ClamAV and SpamAssisan) and mysql.
However, with this setup, authenticated users are able to spoof outgoing message by simple changing the "from" tag.
Does anyone have any ideas on how I could implement some address mapping to users?
In this setup, postfix users are NOT system users, by are stored in the database.
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Mar 11, 2010
Here is what i do: make clean make makefiles CCARGS='-DEF_CONFIG_DIR="/opt/product/postfix-2.6.5/etc"
-DEF_COMMAND_DIR="/opt/product/postfix-2.6.5"
-DEF_DAEMON_DIR="/opt/product/postfix-2.6.5/libexec"
-DEF_MAILQ_PATH="/opt/product/postfix-2.6.5/bin/mailq"
-DEF_DATA_DIR="/opt/product/postfix-2.6.5/lib"
-DEF_NEWALIAS_DIR="/opt/product/postfix-2.6.5/bin/newaliases"
[Code]...
make install then i got this error: postfix: fatal: chdir(/usr/libexec/postfix): No such file or directory make: *** [install] Error 1 I don't understand why it's checking the usr/libexec folder for the daemons although I've set the folder to /opt/product/postfix-2.6.5/libexec in the makefile. Here is also the cat of my makedefs.out:
[Code]....
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Sep 4, 2009
I hv Cent OS 5.3 installed as server. I hv a network of approx 100 desktops and laptops. For a security purpose i want to block certain laptops from gaining a the network access using dhcp. Can we block the ip address leasing if a specific MAC address request for a ip lease?
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Aug 4, 2011
If I give "ifconfig" in my laptop I get eth0,lo,wlan0.In that where do I find my Ip address in Ubuntu in 10.04. In eth0 I dont find inet address.Where can I find it?
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Mar 15, 2011
i am pretty much brand new to ubuntu i have messed around with it a little and have gotten my apache2 server up and running what i have some questions on is
1. How can i give my server a actual address and not my ip address?
2. Is there any way i can put like forum software on part of it? if so how?
3. What is the best way to write web pages i know some html so thats how i was able to write what i have now just wondering what best way is
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Jun 3, 2009
I want to know how to bind Ip addresses to its mac addresses in Squid Proxy
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Nov 24, 2010
Im trying to setup dhcpd to put certain systems witch have mac address starting with 08:00:* in a certain ip class. How can this be done?So any system with mac address starting with 08:00 to get an ip from this range 192.168.12.2-192.168.12.99.
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Aug 17, 2010
I gave my pen drive to my friend who is using window system.and now when i tried to delete two files autorun.inf and Rahul'sVirusprotection.vbe it give error message Error removing file: Read-only file system.
here is the content of RhulVirusprotection.vbe code...
while last time i used my pen drive on my system it was doing fine.Can any one suggest me what is going wrong and how any window's script can affect linux system(if my prob is due to that script)
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Oct 29, 2010
I want to install cyberlink power director on ubuntu 10.10. Problem is that when i check the box in the properties of .exe file to make it executable it automatically unchecked in no time. Now what should i do now.
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