Software :: Configure Postfix To Connect To Remote Smtp Server?
May 5, 2010
Try as I might I cant get postfix to send emails through an external email server (I can succesfully get client software to do it no trouble) After following the howto at: [URL] I get 5.0.0 errors re:
Code:
May 6 16:06:32 SERVER1 postfix/error[20357]: 2392F21438: to=<SOME_ADDRESS@hotmail.com>, relay=none, delay=0.17, delays=0.1/0.01/0/0.06, dsn=5.0.0, status=bounced (smtp.live.com)
Here's my main.cf
Code:
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
[Code]....
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Oct 23, 2010
Try as I might I cant get postfix to send emails through an external email server (I can succesfully get client software to do it no trouble) After following the howto at:
[code]....
I get 5.0.0 errors re:
Code:
May 6 16:06:32 SERVER1 postfix/error[20357]: 2392F21438: to=<SOME_ADDRESS@hotmail.com>, relay=none, delay=0.17, delays=0.1/0.01/0/0.06, dsn=5.0.0, status=bounced (smtp.live.com)
Here's my main.cf
Code:
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
[code]...
I get basically the same error no matter what smtpserver/username/password combination I use leading me to believe its my setup and not my username/password
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Jun 24, 2011
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.
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May 25, 2010
I'm trying to set up a basic smtp server on my local computer that I can send basic, unencrypted email through on port 25. I installed postfix, and I chose the following options:
Internet Site,
System Mail Name: localhost
Root and postmaster mail recipient: I left this blank
For other domains to accept mail, I entered : NONE, localhost
No force synchronous mail updates
Local networks: 127.0.0.0/8
[Code].....
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Apr 18, 2010
But I fully have my server and everything up, MySQL, PHP5, Apache2, Postfix, Courier, SQMail, can't remember what else atm.
I installed mailx and used the mail command to send an email to my external email address, worked just fine. sent it to another email, worked as well.
But the problem is, I do 'telnet localhost 25' to test it like they say, it connects. I run 'ehlo localhost' Nothing happens.
I've tried setting it up with Thunderbird on my home pc and it connects to the IMAP & POP servers just fine, but it cannot establish a connection with SMTP, I've tried changing the SMTP port to other ones, still no luck.
Oh BTW, I use Ubuntu 8.04 LTS (Hardy Heron)
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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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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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Feb 19, 2011
I'm trying to use different MTA servers (one for each domain) on the same public IP and port (25). Here I attach a graphic of my idea, to have a Postfix server that receives all incoming mail from internet, and relays to different local servers. esquema_mta-dns.jpg How can be configured the "Relayer MTA" ?
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Nov 26, 2010
my postfix to send and recive external emails, but many recive in trash folder.Other programer say me that is need some configurations in postfix with and dovecot to work, but i dont know what!This is my first time configuring a linux server at this week.
my main.conf
sample_directory = /usr/share/doc/postfix-2.3.3/samples
readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
[code]...
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Jun 9, 2011
I have postfix relaying email to the internet for my LAN I need to configure postfix to trust only one SMTP server to relay his emails to the internet
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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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Oct 27, 2010
I have the following config with Postfix:
Quote:
But it keeps coming up with:
Quote:
Is there any reason from these configs as to why this should be occuring?
This was the guided step by step tutorial I followed: [url]
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Sep 20, 2010
I have searched through piles of postfix and sendmail documentation but I'm not sure of the terminology to describe what I want to do so I'm never sure what solutions are workable. Null client, relay hosts. What I have already is a RHEL postfix server which sends and receives email. What I want to do is add a second postfix server to the network. The second server should accept only ssl smtp mail and forward it on to the main postfix server. Users shouldn't use it for normal internal sending/receiving. It's only to allow me to support ssl smtp from people working out of the office without messing about with the main postfix server. I thought a Null Client sounded likely but I don't think it will accept mail. Is it a relay host I'm trying to configure? Any pointers on configuring something to just accept secure smtp and forward?
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Dec 13, 2010
I am using the Postfix SMTP server for sending emails. However I just did a default installation and subsequently someone is sending spam using my SMTP server. I would like some help on securing my Postfix server and to block these mischievous emails being sent from my server.
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Mar 15, 2010
I am looking at setting up a multiple postfix SMTP servers for a single domain. Below is my requirement, I would appreciate if someone out there could guide me to achieve this using postfix..
1. Want to setup 2 postfix SMTP Server with 1 POP3 Server.
2. Server1 will host POP3 & SMTP services for domain "metallica.one".(IP: 1.1.1.1, MX: mx1.metallica.one)
3. Server2 will host only SMTP services for domain "metallica.one" (IP: 1.1.1.2, MX: mx2.metallica.one)
4. Server1 & Server2 will be used as load balancing for sending mails. (either manual settings in email client, or auto-loadbalancing is still preferred).
5. Mail received for domain metallica.one on Server2 should be pushed/forwarded/relayed to Server1 where POP3 services are running.
6. Outgoing mails for other domains from Server2 should be sent directly to the other-domain-recipients without relaying to Server1.
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Apr 10, 2010
I'm trying to configure Postfix with a mail server that I programmed in C. The main.cf is set in this way :
Code:
relayhost = [myMailServer.localhost]
smtp_sasl_auth_enable = no
smtp_use_tls = no
disable_dns_lookups=yes
smtp_never_send_ehlo = yes
code....
I don't know why it doesn't receive response after HELO. In fact if I debug my mail server with gdb, I can see it sends a 250 response code. Moreover, I've tested my server both with traditional mail clients, as Thunderbird, and through telnet session and it works very well.
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Dec 2, 2010
I'm hoping someone here can help, as I've been beating my head on the wall for a week now with little advancement. I've found a number of tutorials on setting this up, however none of them have gotten me 100% of the way there. Here's my situation: home-based Fedora server (Core 8), running sendmail 8.14.2-1. Connecting to hosting company's smtp server over port 587, to bypass Verizon's blocking of port 25.
My /etc/mail/sendmail.mc file looks like this (comment lines removed):Quote:
divert(-1)dnl
define(`SMART_HOST', `smtp2.datarealm.com')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 PLAIN')dnl
FEATURE(`authinfo',`hash -o /etc/mail/auth/client-info.db')dnl
define(`RELAY_MAILER', `esmtp')dnl
[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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Feb 26, 2010
I followed this How To (https://help.ubuntu.com/community/Postfix) in order to add smtp authentication to my Postfix installation used as spam filter for my exhange server, and it'seem all ok; the only thing that I don't understand is where I list all the users (with passwords) that I authorize to send mail through my server...
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Sep 2, 2009
Can anyone help me regarding SMTP configuration? I can able to configure and i can send mail from my domain to other domains but cant receive from outside domain
My question is what are the steps to configure SMTP...suppose i wanna configure SMTP server test.com and my hostname is ns1.test.com. so please mention the steps
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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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Feb 25, 2010
I need to setup a mail server, purely for relaying mail to a MS exchange server. A previous employee used Postfix on CentOS. I have limited Linux knowledge and no experience with any mail server software other than MS Exchange, so we cannot continue with this solution (unless I can find a way of managing it all from a gui). Does anyone know of an MTA that can be configured completely by GUI? Everyone says sendmail has millions of features and loads of documentation, but I simply do not have the time to learn it. I need something that can be configured with minimal knowledge and via GUI, not command line. The only reason I'm not using Exchange is to try to save money, and hopefully it will be more secure.
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Jan 31, 2010
I have scalix (sendmail) installed on my server and it is working very good but I need to change the smtp listening port because I am thinking that my sendmail is being used as a spam engine.
what/how I need to configure in order to change the smtp port?
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Apr 19, 2010
It seems my sendmail (running in slackware 13.0) cannot send out emails correctly. I guess I need to tell it what is the smtp server to use. And, I heard, gmail's smtp server is available to use for this purpose. How to configure my sendmail this way?
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Jul 24, 2010
I have been using evolution to send/receive email from my account with 123-reg with no problems. My home ISP is aol. I am currently on vacation in France and using orange.fr as my ISP. I can still receive email from 123-reg but when I try to send, get the error message "Could not connect to smtp.123-reg.co.uk: No route to host" 123-reg help seem to be either clueless or not bothered. I've tried altering settings in evolution preferences, but nothing seems to work. Currently set to "server requires authentication"
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Aug 30, 2010
This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
xx@xx.com
SMTP error from remote mail server after initial connection: host [URL] [ip address]: 550 Access denied...
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Nov 27, 2009
I'm using postfix to send some mail from my cloud server via a web page on my website that uses PHPmailer to do SMTP authentication. My cloud server has a dedicated IP for all inbound and outbound data. The problem I am having is that it sends roughly 75 - 100 messages successfully before it returns the following error for the remaining few hundred recipients in my list:
SMTP Error: The following recipients failed: example@example.com Mailer Error [URL] SMTP Error: The following recipients failed: example@example.com SMTP server error: 5.5.0 Sender already specified
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Jul 12, 2011
I run my own mail server. There's only one part that isn't working and I can't seem to figure out why: sending mail from a client - in this case, Thunderbird.
I can send mail off-server just fine if I log in via telnet. I can receive email just fine with Thunderbird.
Here are my relevant configs:
/etc/postfix/main.cf:
Code:
queue_directory = /var/spool/postfix
message_size_limit = 102400000
mailbox_size_limit = 1024000000
command_directory = /usr/sbin
[Code].....
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Apr 24, 2011
i need to configure postfix on centos to relay email from the internet to the Exchange Server and i also need that emails sent from the exchange within the same domain be sent to postfix then resent to exchange because i have spamassassin and clamav installed on centos to filter all incoming and outgoing mails ...
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Jul 17, 2010
im trying to setup a mail server i am with fedora core, postfix and i have a dsl internet connexion my ip is dynamic so i readed some tutorial on how to configure postfix
Quote:
myhostname = mta1.domain.com
mydomain = domain.com
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