Software :: Rejecting Continuously Changing Incoming Mail In Postfix?
Apr 4, 2011
I've read many post close to my subject regarding blacklisting incoming emails, but non of them described what I really want:How can I reject a continuously changing email from my postfix, here is what I mean:
I think you got what I mean, the thing I've taken from the posts I've read is that I created a sender_access file hashed it and added the:smtpd_recipient_restrictions = check_sender_access hash:/etc/postfix/sender_accessto postfix main.cf configurationThe sender access file reads:abduooo*@googlegroups.com REJECTBut that didn't work, I know that there is some magical slashes and dots to be added to the sender_access, but I don't know which.
I have enforced to use the Linux /etc/passwd file to authenticate myself from Outlook, Postfix will accept mail from any IPs. However, I'm not able to send mails from my Outlook via my mail server to someone else on the Internet. Am seeing the following in Postfix's log.
Code: Mar 11 21:07:39 production postfix/smtpd[16366]: connect from pcdxxxxx.netvigator.com[203.218.211.256] Mar 11 21:07:39 production postfix/smtpd[16366]: NOQUEUE: reject: RCPT from pcdxxxxx.netvigator.com[203.218.211.256]: 554 5.7.1 <someone@hotmail.com>: Relay access denied; from=<mate@mydomain.com> to=<someone@hotmail.com> proto=ESMTP helo=<Windows> Mar 11 21:07:42 production postfix/smtpd[16366]: disconnect from pcdxxxxx.netvigator.com[203.218.211.256] Here are my Postfix settings.
I have this strange error - I switched from postfix 2.6.5 to 2.8.2 and I some mailservers cannot send mail to me. One of them was some sendmail server. I have virtual alias maps in mysql. It works fine for almost all server that are sending mail to me, but some of them seems to send mails as user@FQDN instead of user@virtualdomain my machine name is x49.tvujweb.cz, and mz email is kamil.horky@servis-it.net but in server logs is that user kamil.horky@x49.tvujweb.cz cannot be found in virtual alias maps.
This seems like a relatively simple question, but I haven't been able to figure it out from the documentation after a couple of hours of searching. I'm running postfix on my mail server, and the vast majority of my spam has the sender address spoofed to match the recipient address. I've got spamassassin up and running, and very little gets through that, so it's not a serious problem, but if possible I would like to be able to reject the mail before it arrives to reduce the system load.
Mail is sent locally via webmail, relaying is denied, so the only way that mail should be sent from the domain is via a connection from localhost. The basic idea I'm thinking of is if the MAIL FROM sender claims to be an address at the receiving domain, but is connected from a remote IP, the mail should be rejected.
I'm using postfix on Ubuntu 9.10 and all I need is to occasionally send automated emails from perl or php scripts when data processing errors occur. In other words, I want to reject any connection attempts from remote clients and otherwise allow nothing except outgoing emails from one particular account.f I add this line to the default main.cf, will it do the trick or is it more complicated?
As a part of migration I am proposing different scenarios to my organization. One which is asked to prepare is to configure multiple mail servers to handle incoming and outgoing mails. Say I have -[URL], I need to have accept mails from [URL] and send mail from [URL].
I have a server with a domain running and im trying to resolve the mail server but i can't see where to start. I use OpenSuse 11.2. Basically, for starting, i want postfix to send incoming emails to a php script or perl. for outgoing emails i guess that i could use php mail function and i will see what else to have. I configured the dns. I do a dig.mydomain.tld MX and i get the following:
I've enabled popb4smtp in my mail server. Is this because of the IP 117.58.246.10 don't have a dns record? How can I sending email from this type of Ip which don't have dns entry?. But if I enable SMTP auth I can send email form this same ip. Another thing is I can connect to port 587 from the email client to send email but can't connect to port 25.
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>
I have an ubuntu server running postfix 2.6.5 (configured using DTC). If a user tries to send an email to more than one recipient, and one recipient address is bad, then the server returns an error and no mail is sent (even to the good addresses), rather than letting the good ones through. Error displayed by thunderbird is
Code:
"An error occurred while sending mail. The mail server responded: 5.1.1 [URL]: Recipient address rejected: User unknown in virtual mailbox table. Please check the message recipient noreply@domain.com.au and try again." and mail.log shows ...
Code:
Oct 6 20:35:08 www1 postfix/smtpd[22716]: connect from xxxxxx [xxx.xxx.xxx.xxx] Oct 6 20:35:08 www1 postfix/smtpd[22716]: B62F92A44: client=xxxxxx [xxx.xxx.xxx.xxx], sasl_method=PLAIN, sasl_username=blake@domain.com.au
I've recently followed a guide I found online [1] and installed Postfix and Courier on my server machine. I can send emails from the server to any email address but unfortunately I can only receive emails sent from the server - it's only accepting emails sent locally from the host.
I recently set up a machine with Ubuntu 10.4 LTS to help to replace an aging VAX mailserver that was the DMZ mailserver for the company I work for. I set up a default install of postfix (via apt-get) to function as a DMZ border device that routes between two internal mailservers based on subdomain aliasing via internal DNS.
The problem is that although I have installed no anti-spam or anti-virus options, mail sent to this machine from any outside source containing a password-protected zip file is being rejected with error:
552 Password protected zip file found inside of the email
At first I'd thought that possibly it was the sending mailserver issuing this error, but after further testing I found that no matter the source, any password protected zip file is immediately rejected. Being as we're in a HIPAA-sensitive environment, this has been relied upon as a backup for people to do one time encrypted file sends via email. The file in question is relatively small, and I do not have any quotas on, and the same test file sent two ways (one encrypted zip and one non-encrypted zip) caused the encrypted zip only to fail.
As stated before, I do not use any type of antivirus or antispam measures, no header or body checks have been put in place, and in the course of trying to troubleshoot this problem, have probably opened my server up more than is strictly wise. I really need to enable this feature as being unable to take encrypted zips puts the entire migration at risk.
I've got an uber simple test mail script in php on my awesome new dev machine running Ubuntu:
PHP Code:
Unfortunately, something is preventing mail delivery. I can't tell from this error log whether it's the remote machine rejecting me or whether it's my machine rejecting the self-signed cert on the remote machine:
Code:
I'm wondering what I could change in my postfix configuration to remedy this problem.
I tried setting smtp_tls_security_level = may = may but this did not change anything.
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
I have setup a postfix mailserver and it seems to be working ok, we are only using this to relay mail to our forum users. Its not being used to recieve any email only send them out to the internet.
What is the difference between the mail.log and mail.info files? Can I turn one or both off? I see alot of messages like...
Just wondering what this string of log entries means? Also I am getting duplicates in the syslog file as well.
Two exchange servers internally. One is setup for example.com (192.168.1.10) and the other is setup for example2.com (192.168.1.20) Both are behind a single public IP.
I want to use postfix to sit in front of the two exchange servers. Postfix will accept mail for both domains and relay to the appropriate server. I have postfix installed with only defaults at this point.
I'm running SUSE linux Server version 11. I want to configure mail server with postfix & cyrus-imap. For that, i have read many documents in Internet by i met issues. I'm running DNS in this server & it's ok Now I cannont send mail through command line.
I am setting up a server that is to serve websites and host mail.I have run into a problem regarding the mail server. The server is completely set up but for some reason it is not receiving the e-mails I am trying to send to it. When i mail to the associated mail address from internal by the "mail" command it works fine. But when I try from an external mail server, the mail never gets through. And I do not receive a bounce e-mail.
It says that the port 25 IS open for TCP connections (in iptables - I opened it myself). And surely when I telnet to it on that port from inside the server, I get an connection. But when I telnet from an external network I get a refused connection. It would sound that the port is in fact not really open for external use, in my mind, but it is. Is there possibly anything else I might have neglected to check in this mystery
I set up my mail server using the guide here: [URL] I am able to receive mail, I can send mail locally, but I can't send to external addresses. This is in my mail.log: Quote: Jun 30 14:40:43 Server postfix/smtp[10725]: 2FD9322015BF: to=<myemail@gmail.com>, relay=none, delay=1634, delays=1484/0.02/150/0, dsn=4.4.1, status=deferred (connect to alt4.gmail-smtp-in.l.google.com[74.125.65.27]:25: Connection timed out)
The scenario: We have an external server that runs HTTP/DB servers for out shop system. Then, there's our local, in-house infrastructure that runs a.. yeah... Exchange 2010. The shop system on the external server needs to send mails to customers (order confirmations, invoices, etc.). seing as sending them directly through the local MTA (Postfix) would cause mail delivery problems because of reverse DNS issues, i've set the Postfix MTA to act as a satellite to our in-house Exchange Server, so the Exchange sends the mail instead, giving recipient mail servers a valid reverse DNS lookup.
Now, mails sent by the (proprietary, uneditable) shop system are relayed correctly and sent to the target e-mail address. My problem is: Mails not sent by the shop system, but by our own PHP scripts which run on that same external servers, are NOT relayed properly. So the Exchange is fine with the mails sent by the shop system, but not the mails sent by our scripts. This is what i get in the mail.log: The successfully relayed mail sent by the shop system:
I'm running a Debian LAMP server and I am adding postfix. The initial config is working and I can send and receive mail both locally and over the WAN. The problem is that I cannot get mail delivered to the user's home directory using Maildir/. I have set the:home_mailbox = Maildir/ parameter in main.cf but mail still goes to /var/mail after Postfix reload. The system is now using Maildir/ instead of mbox but in /var/mail. I really want to get mail into the user's home directory.
i'm using Thunderbird as mailclient.n i receive a new mail, i want TB to run an application (which blinks my notebook-keyboardlight ).Is there a way to do that?And btw. does someone know, how to minimize TB 3 in the systray of gnome (Fedora 12)?to get the mailnotification icon in the systray?
I'm running SuSE 11 with sendmail and dovecot.I'm sending and receiving mail. But as soon as someone sends me a mail with an attachment over 1mg it seems to fail. I have no problem sending big attachments.
I plan to make a script for the console server via mail, but I find difficulties in the reading of email applications, to email me using the mail command, but how to read the incoming mail
I installed a new server running CentOS 5.2. I have iptables and SELinux off. The new server will not accept incoming mail. It will send out fine.Our mail server redirects mail for it.help to it.[url]...- [url]....is this server. Any messages sent to this address get stuck in a deferred queue. The error message on each one (from the mail server admin console) is "connection to[url]... [10.9.10.202] - connection refused". I can ping [url].... from the mail server.
This seems like a firewall issue, but it is off. Is there some configuration file I need to change to allow incoming mail? Or is there some test I can run on the new server to further troubleshoot what is going on
assist me in using the iptables firewall to block all incoming mail traffic (SMTP port 25) except that of a certain IP(s)? the situation is that we have a server that we only want to receive mail from a particular sender.
I'm trying to set up my Thunderbird 3.1.8 (running on Ubuntu 10.04 LTS) to play a .wav file of my choice when new mail arrives. The file I've chosen is 8,8 KB in size and lasts 3 seconds. I've selected the "Play a sound" + "Use the following sound file" options in my Preferences, but only the first second (if that) of the sound gets played - both when I click the "Play" button in the Preferences menu to test it, as well as when receiving mail. Restarting the program with my new settings doesn't help.
Actual question(s): - Is there a limit on the size/duration of the sound one can use for such a signal in this program? - Is there any way to modify this limit?
Request your help in writing a shell script for the following requirement:
1) scan each incoming mail with conditions on sender name and subject 2) scan the mail body for set of characters and email them.
general usage is as follows: I get a mail as follows from: [URL]... subject : Urgent, reply body : name : xyz contact : 12345 the script should mail the following as subject line: n:xyz c:12345 I know procmail is a good option for this, but I'm compelled to use shell script
I have been trying to solve this problem for two days now looking at various forums and websites but can't really figure out what's going on here.I have setup postfix on my ubuntu and I can send emails using "telnet localhost 25" and the ehlo thingy. Apache can also send emails. My problem is with incoming emails. When I try to send an email (through Gmail) I get the following error message:
Code: Delivery to the following recipient has been delayed: root@example.com
