OpenSUSE Network :: Deal With Mass Postfix Relay And Dovecot Login Attempts
Jul 25, 2011
For about a week now I've been seeing mass attempts to relay through postfix and login to dovecot from the same 2 addresses, none are successful due to how postfix/dovecot are configured and I wouldn't be overly worried but my isp have picked up on it and are nagging at me
What ways do people go about just dropping connection attempts from offending addresses/ranges when stuff like that happens? An ideal thing would be something that detects repeated failed attempts from a host or range and subsequently ignore/ban them, perhaps for a specified length of time, something along the lines of denyhosts and fail2ban for ssh would be great Don't know if there's anything out there or just a plain tried and trusted method anyone might use for stuff like this, if not a hint on the most appropriate way to go about it 'manually' would do
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Dec 17, 2010
I have setup up an Opensuse as a simple we/application server.It handles requests for various things and will need to send out email on occasion for things like password reset requests, information / warnings etc. etc.This is a standard OPenSuse 11.x install with defaults so it comes with Postfix as the mta.I do not want a mail server I just want to send out via my clients mail server which is hosted exchange rackspace, which simply requires SMTP auth to do so.What would be the proper way to do this so ALL e-mail send from this machine, regardless of account like WWWRun or when logged in and sending from the command line has the same sender all the time.
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Jun 4, 2011
I was never confident with postfix, but used it for several years now on my own server. I even noted the exact config used. But my old server crashed and I have to build fast a news one and I don't receive mails anymore. Here is the log message when trying to send to me from gmail:
Jun 4 08:06:34 ks3095514 postfix/smtpd[4008]: connect from mail-pw0-f50.google.com[209.85.160.50]
Jun 4 08:06:34 ks3095514 postfix/smtpd[4008]: NOQUEUE: reject: RCPT from mail-pw0-f50.google.com[209.85.160.50]: 554 5.7.1 <jdd@dodin.net>: Relay access denied; from=<lesrevesdeness@gmail.com> to=<jdd@dodin.net> proto=ESMTP helo=<mail-pw0-f50.google.com>
Jun 4 08:06:35 ks3095514 postfix/smtpd[4008]: disconnect from mail-pw0-f50.google.com[209.85.160.50]
The main.cf file is the openSUSE default one (see below). Part of my problems seems to come from the reverse. I *could once* receive one test messsage to " ks3095514.kimsufi.com" (the default reverse/domain name) (below, commented out), but not for my own domain (dodin.org). Most of the time the only necessary lines are mydomain, myhostname, myorigin and mydestination, but this don't work anymore. New defaults??. local (from and to the server) mail works, root can send to jdd and I read it from home.
mydomain = dodin.org
inet_protocols = all
biff = no
mail_spool_directory = /var/mail
canonical_maps = hash:/etc/postfix/canonical
virtual_alias_domains = hash:/etc/postfix/virtual
relocated_maps = hash:/etc/postfix/relocated
transport_maps = hash:/etc/postfix/transport
sender_canonical_maps = hash:/etc/postfix/sender_canonical
masquerade_exceptions = root .....
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Jun 3, 2010
We have OpenSUSE 11.2 64bit installed (Intel XEON 4 core 2.5GHz, 4GB RAM, 500GB RAID ). One of our requirements is to provide huge emails (up to 100M each) sending and receiving. For this purpose we have configured posfix and dovecot(POP3+IMAP). Then issue is that when email size is greater than 32M it sometimes (very often) couldn't be received by users through POP3 protocol and also through IMAP (receiving process fails at server side). Could it be a kernel or hardware compatibility issue?
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Apr 29, 2011
My issue is that i'm trying to send emails with postfix and gmail as the mail relay,i'm trying to send emails to my self by sendmail -bv user@gmail.com
In the logs, i can understand that it been delivered to the destination,
taken from: /var/log/mail.log:
Apr 30 00:05:23 moni postfix/pickup[10490]: 9C7552170C: uid=0 from=<root>
Apr 30 00:05:23 moni postfix/cleanup[10495]: 9C7552170C: message-id=<20110429210523.9C7552170C@moni.localdomain>
Apr 30 00:05:23 moni postfix/qmgr[10491]: 9C7552170C: from=<root@moni.localdomain>, size=283, nrcpt=1 (queue active)
code....
When login in my gmail account i can't see nothing under the sent / inbox / spam folder.
it's seems like the mail are been sent.. but nothing is happening.
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Oct 15, 2010
Somehow an app on this box seems to have disappeared long ago which was configured to start immediatedly with a root login (eg su). Now, whenever upgrading permissions to root or logging (and assuming login as root), an error displays saying "cannot find <application>"
Considering root usually is different than other logins, am not sure where to start looking on an OpenSuSE box. I've tried without success
BASH -v to enable verbose mode before executing a "su."
BASH --debugger to enable debugging mode before executing a "su."
Logout, Login as root and inspect /var/log/ hoping to find some logfile that audits the login sequence, but may be looking at a wrong logfile.
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Mar 16, 2010
Yesterday I applied the su security patch to my openSuSE 11.2 x86_64 system.After applying the patch, any attempt at su failed, and after rebooting the system earlier this morning any login (root, user, otherwise) fails with a "Permission Denied".Is it possible that the su update somehow messed up my (standard) pam settings?
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Jun 3, 2010
When attempting to check my postfix install by using telnet to send an email to an address outside my local network, I get a relay access denied error.
This is how I attempted to send an email
Code:
telnet my_server 25
helo my_server
mail from: me@my_server
rcpt to: me@gmail.com
[Code].....
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Feb 21, 2011
I currently have a postfix / dovecot server running on one ubuntu server with nullmailer relaying webmail on a different server. This is currently working except the mail server is rejecting incorrect addresses which results in the messages being stuck in the nullmailer queue on the webmail server. Is it possible to force postfix to accept and manage all relayed messages from webmail, or is it possible for the nullmailer to manage the bounced messages correctly?
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Jul 27, 2009
I have a linux box on my DMZ with postfix on it. I have exchange on our internal LAN on 10.152.0.104.
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May 25, 2010
Some mail coming to my postfix server will need to be delivered local and the rest to an internal mail server.
The internal mail server is mail.example.com where there is no bob@example.com but there is a sam@example.com.
Is it possible to configure postfix to do this?
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Mar 23, 2010
I just finish install & setup postfix & spamassasin. I can send & received email from my local area network. i already install webmail client & I can send received. When using my pda from outside my network I can received but I just can send email to my domain only. For other domain it's error relay access denied. Here my postfix configuration.
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Aug 9, 2011
On my opensuse 11.4 box (although I assume the version is irrelevant), I'm trying to figure out how to do something with the mail command. We have multiple smtp relay servers and sometimes I have to test to verify that mail is bouncing off of them successfully. On my laptop, in my main.cf file for postfix, I've got the relay server listed. But to test multiple servers, I have to change the main.cf, restart postfix, send message, and then repeat for each test.
I'm trying to figure out a way to specify the smtp relay on the command line. I've been playing with the -S option which is supposed to allow variables and one of the variables in the man page is 'smtp'. I've tried several different syntaxes but nothing seems to work.
The closest I've come is:
mail -S smtp 10.1.0.63 -s "test" user@email.com < main.cf
That syntax doesn't give me an error but it still routes the message off the smtp server listed in main.cf which is not 10.1.0.63.
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Jan 26, 2010
I've search high and low.. does anyone know how to configure Postfix/Dovecot to use another SMTP server (i.e. smtp.comcast.net) as my ISP blocks port 25?
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Jun 12, 2011
Has anyone managed to get postfix working using virgin media as a relay?
is there any alternative if thats my ISP? they wont give out static IP
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Mar 21, 2011
distro = debian 5
when i tried to send to other domain, i will get "Relay access denied"
below are my configs
main.cf
Code:
# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
[Code].....
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May 27, 2010
I have configured Postfix, mysql and Dovecot according to following guide. [URL] My issue is When I'm Install dovecot ( using yum command). it Didn't create a "/usr/lib/dovecot/deliver" folder.Then my mail.log trace this error message
Code:
May 27 16:36:02 localhost pipe[26056]: fatal: pipe_command: execvp /usr/lib/dovecot/deliver: No such file or directory May 27 16:36:02 localhost postfix/pipe[26055]: CE9768FED3: to=<john@example.com>, relay=dovecot, delay=26, delays=26/0.02/0/0.02, dsn=4.3.0, status=deferred (temporary failure. Command output: pipe: fatal: pipe_command: execvp /usr/lib/dovecot/deliver: No such file or directory )
After that I have create "/usr/lib/dovecot/deliver' folder. Then I have set permission using follwing command.
Code:
mkdir /usr/lib/dovecot/deliver
chown vmail /usr/lib/dovecot/deliver
Now My log file trace this message
Code:
May 27 19:26:52 localhost postfix/pipe[30111]: E178F9000E: to=<john@example.com>, relay=dovecot, delay=388941, delays=388941/0.02/0/0, dsn=4.3.0, status=deferred (temporary failure. Command output: pipe: fatal: pipe_command: execvp /usr/lib/dovecot/deliver: Permission denied )
how to set permission for this? Or My configuration is wrong?
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Feb 26, 2010
Im a fairly new linux person and have a hopefully easy question. I am running centos with dovecot and postfix for the mail. Im using imap so all the mail is on the server. Im also using thawte certificates. What is the easiest way to move all of this over to a more stable box? The box i have now is a major POS.
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Mar 20, 2011
CentOS 5 box was just setup to replace a crashed old one. I have postfix.admin installed and working, added users (confirmed from mysql command line) and can login using telnet server pop3 with the user information. The problem I am left with is just receiving mail. I have both squirrelmail and roundcube installed, and can also authenticate using both (/var/log/maillog shows);From either webclient I can naturally send mail out and both yahoo and gmail client confirms, yet a reply shows nothing, and nothing ever shows in the maillog. Firewall is shut down but I don't know postfix enough to see how to test, or is something else grabbing the mail.
I can provide anything necessary, just let me know what. As I see it (just so far) Postfix should be the server that answers and receives the mail, dovecot is more the pop/imap the client would use, so I think it's a postfix issue. If so, can I turn up the debugging, etc. but again, I think all mail received should appear in the maillog file 1st as I see the outbound mail go fine!
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Jun 7, 2009
I am trying to setup sendmail on a fc10 box with dovecot running imap. I have everything configured and running on the server. For example, when I run "echo 'test' | mail -s test user@mydomain.com" or even to someuser@gmail.com, the mail goes through just fine. I can then reply from both of those accounts back to the server, no problem.
Relaying denied Cannot send mail. The SMTP server does not recognize any of the authentication methods supported by Entourage. Try changing the SMTP authentication options in Account settings or contact your network administrator.
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Jul 2, 2010
My postfix is ok with receiving emails but i can send mail to my domain only [URL] When I want to send to other domains i receive this error (in the maillog):
Quote:
postfix/smtpd[14172]: NOQUEUE: reject: RCPT from 93-46-46-73.ip106.fastwebnet.it[93.46.46.73]: 554 5.7.1 <giannileggio@shoppeo.com>: Relay access denied; from=<info@sampledomain.com> to=<giannileggio@shoppeo.com> proto=ESMTP helo=<[36.234.52.97]>
it is the same via thunderbird or via telnet. This is my configuration
Quote:
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
[code]....
I used 'sampledomain' instead of my real domain
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Mar 1, 2011
I have a mail server running Postfix and the problem I'm running into is that when trying to send mail, I get a "relay access denied" error.Inside my main.cf, I did not specify 'smtpd_recipient_restrictions' so by default, the variable is:
Code:
smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination
The 'mynetworks' variable looks like this:
[code]....
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Feb 11, 2011
I'm trying to set up my postfix server to relay mail (via a php cms) using Gmail's smtp on my account, but for some reason, Gmail returns an error code that StartTLS must be sent first, my postfix main.cnf file can be found at pastebin, because of this forum's text length I cannot paste my postfix main.cnf file as can be seen I have everything set and configured for Gmail, but postfix (for some unseen reason) can not send StartTLS. [URL].
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May 13, 2011
I'm using Ubuntu Server 10.04 and I can successfully relay mail generated by php scripts through an Exchange server.What I want to do is accept incoming mail from the Internet through postfix and relay it to the Exchange server but I want all mail that is not addressed to ...@mydomain.edu to be discarded.
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Jan 2, 2011
I am running CentOS 5.2 on a server here in my home. It runs Dovecot and Postfix and also serves as a website host for a small website of mine. Everything works fine. POP, SMTP, Webmail, WWW, all works great and has for ages.Here's the issue. I recently reinstalled a clean copy of Windows 7 on a workstation in my home onto a new harddrive(I still have the old drive int he machine so I can boot to it as well). I setup the Windows Live Mail client to send/receive mail with my mail/web server. However, it won't connect to the POP server on my server machine.Here's the kicker. If I boot to the old harddrive that is running Windows 7, it connects fine to my mailserver and can send/receive just fine. I've checked, rechecked and rechecked and all mail settings on the mail clients on both drives are identical.
Note: The installations of Windows 7 on both drives is identical. Same computer name/ same credentials, same IP, etc. However, as I stated, I can send/receive email with my server if I boot to my old drive, but if I boot to my new drive, I cannot send/receive.
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Jul 17, 2011
I'm trying to setup postfix (or exim, I don't mind which), so I can move away my last remaining PC from Windows.I've tinkered with Postfix for good part of a month and I can get it to accept emails using SMTP and post them to a virtual mailbox based on MySQL tables. And it rejects mail addressed to local email addresses that it can't find in the table.
First question (or problem.) I've set up Postfix to relay email it cannot deliver locally such as is the case when you send out an email. My remote host requires authentication. How can I set this up?
Second question: I want to force my clients to use either AUTH, TLS or SSL, and not allow anonymous connections (to prevent an open relay server.) How do I set that up without interfering with the smarthost setting? The smarthost login is not one of my clients, it's a pre-determined login and password that is solely used for the email relaying aspect.
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Jan 20, 2010
I got a weird postfix setup question? This is a separate server to the one I posted about earlier today.
I need to setup a postfix server which will accept emails for local know address (full addresses) and deliver them straight to the users maildir.
Any unknown addresses (however for the same domain), needs to be relayed to another server.
This is a bit of a special setup as there is no fixed Internet connection to the server. So the plan is that local email get delivered straight away whilst emails to the same @domain, but that doesn't exist in the user tables get put in the hold queue and is later relayed to server number 2 when a connection is available.
I am using mysql to retrieve all my settings into postfix.
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Oct 6, 2009
I would like to setup postfix to act as a relay for the outgoing mails of a couple of servers each serving it's own domain.The mails we are talking about are standard administrative emails like user registration, password reset request. The volume of those mails will naturally grow as the site grows. Which for me poses the problem that depending on the growth of the site you will sooner or later hit the quotas imposed by (my otherwise preferred) providers like GMail or smtp.com.
So what I need is a mail relay that will only accept mails from authenticated clients from hosts in its access list and relay their mail without restrictions. Is that possible with postfix? What has to be changed in the config and what are the pitfalls?
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Jan 24, 2010
my server is Redhat as 5 + postfix +Dovecot .when i use smtp to send mail，it can't to send,the system return "relay access denied" ? This is my maini.cf
Code:
# Global Postfix configuration file. This file lists only a subset
# of all parameters. For the syntax, and for a complete parameter
# list, see the postconf(5) manual page (command: "man 5 postconf").
#
# For common configuration examples, see BASIC_CONFIGURATION_README
[Code].....
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Nov 9, 2010
I have tried to find solution in existing posts but could not specifically find any with my kind of issues and hence a new post on oft repeated subject !! -- and apologies for a long long post here.Here is where I am ..On a AMD 64bit machine - I have ubuntu 10.10 desktop installed. I want this development machine to support virtual mailboxes so that I can use them from multiple apps and create real life deployment situations.I installed postfix + dovecot following the tutorials available here and current state is - I can send mails using telnet sessions and I see that the mail files are getting created in /Maildir form as I have directed in the conf files. I have configured Thunderbird mail client as well.
Issue #1: Mail sending works from Thunderbird but it always responds back with 'No mail on server' message when I try to receive mails. SMTP is configured with STARTTLS and POP3 with None (i.e. plain text password)Issue #2: Also, while going thru conf, logs and during testing - I found a few things which defer in this installation for authentication. I have given the session transcripts here.Issue #3: That being major issue - I also want to configure my virtual users to use TB client to access their mails - I did not find any tutorials or pointers towards that in my search for past few days. If I send mails to a non-Unix virtual user - the mail gets stored into /home/vmail/<domain>/<user>/new directory.Here are the conf files.main.cf for postfix
Code:
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific: Specifying a file name will cause the first
[code]....
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