Server :: Configuring Postfix With External SMTP Server?

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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CentOS 5 :: Postfix Mail Server Will Not Start Tried To Change Postfix Smtp Port?

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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Server :: External SMTP Server With PHP / Send An Email Using An External Server?

Feb 9, 2011

I'm rather (VERY) inexperienced when it comes to Linux, but Fedora 14 is the environment I have to use on my laptop at work, so please forgive any dumb that comes out of me.

How do I tell php to send an email with mail() using an external mail server?

The situation: I've got apache/php running a webserver on my local machine. It's for dev purposes only, and the website files I'm using are checked out from our SVN. This lets me make changes to our website while not actually changing our website.

I've come across an issue I'm fixing where I need to verify that an email is successfully getting sent out, and unfortunately, this email is sent out using php's mail(), and not our website's usual $mail object. Unfortunately, I don't have the authority to change how this sends out right now, just when it sends out.

I've been running everything fine on my machine for a month now, and haven't needed the mail stuff until now. How do I tell php to send an email using an external server?

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Server :: Sended Mail Go To Trash Folder Of Reciver Using Postfix In Smtp Server?

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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Server :: Postfix Rejecting Self-signed Cert On Remote Smtp Server?

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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Server :: Smtp Proxy Filter To External Isp Smtp?

Jan 31, 2010

In order to have greater control over the emails sent out the company I imagined the following scenario.ScenarioDescribing in words what I need.ser sends an email to user@hotmail.com for example, using the smtp of my isp (is the internet).Before the email is sent, the firewall checks if the recipient is blocked transparent, if you are locked out rejects the email.I searched several forums and mailing lists, but did not find scenarios similar to mine.Where found situations in which the mail servers were internally in the company, which is not my case.

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Ubuntu :: Configuring Webmin Postfix Server With Multiple Postfix Virtual Hosts?

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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Ubuntu :: Postfix To Trust Only One SMTP Server?

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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Server :: Postfix As SMTP Relay To Exchange Help

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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Server :: Postfix - Sending SMTP Mail ?

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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Red Hat / Fedora :: Adding Second Postfix Server To Support SSL SMTP

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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Ubuntu :: Using The Postfix SMTP Server For Sending Emails?

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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Server :: Multiple Postfix Smtp For A Single Domain?

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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Software :: Configure Postfix To Connect To Remote Smtp Server

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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General :: SMTP AUTH, Sendmail Client To Postfix Server?

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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Server :: Postfix Not Relay Mail Via Gmail Account SMTP

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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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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Server :: Configuring Postfix With Exchange 2003

Jul 6, 2011

I have a Nagios box set up on the corporate LAN. I'm trying to get it to send emails to both internal Exchange addresses as well as doing a direct delivery to internet domains.

I have looked at a few logs and it appears that Postfix is not doing proper DNS lookups on the internal servers. It keeps trying to connect to the domain controllers. I have an MX record specified.

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Ubuntu Networking :: Configure Postfix As Localhost Smtp Server And Send Email?

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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CentOS 5 :: Set Mailx To Use External Smtp Server?

Jan 14, 2011

In Red hat i used the nail command to send mail using an external smtp server without sendmail or other mail services active. My question is: In Centos 5 nail is not present but is present mailx in version 8.1.1-44.2.2

Is there a way to set mailx to use external smtp server ? because in many forum i get the string mailx -S smtp= etc.etc. but in my case the -S parameter generate mailx: invalid option -- S antoher question is there a an official repository to download rpm nail for centos ?

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Ubuntu Security :: Add Smtp Authentication To Postfix Installation Used As Spam Filter For Exhange Server

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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Networking :: Local Smtp Server And Smtp Server Of Domain Registrar Simultaniosly?

Nov 27, 2008

I have a domain name registered in asianet.com, they provide email service also, can i use local mail server and registrar's smtp server at same time?

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Server :: Configuring Virtual Users On Postfix / MySQL Fedora 12

May 9, 2010

I was following the above guide to get a mail server up and running. The major difference in it all is the fact that my server is running i686, but I compensated for that easily, just a difference in folder/RPM names. [URL]. Otherwise I followed it to a "T." Everything seemed to go smoothly, no trips or falls until the very end.

After installing squirrelmail and trying to login on admin@withfrosted.com returns ERROR:
Connection dropped by IMAP server.
Uncle google tells me to run this command because SELinux is overzealous:
setsebool -P httpd_can_network_connect=1

And that works, and I thought I was home free. However, after that, I'm presented with a new error. However, google told me to send an email to create the mailbox because it wasn't there, yet. So I send a test email on over, but that fails, and so does mailx. Next I created /home/vmail/withfrosted.com/admin while logged into the vmail user for proper permissions. Squirrelmail now logs into the mail box but gives me yet another new error, in which I am now stuck on:
ERROR:
ERROR: Could not complete request.
Query: SELECT "INBOX"
Reason Given: Unable to open this mailbox.

As a summary, because I'm all over the place, here:
1. Can't view the mailbox via Squirrelmail.
2. Can't receive email, tried with mailx and a test email from gmail.

Regarding #2, the gmail test email, from the maillog:
May 9 07:25:45 withfrosted postfix/smtpd[21095]: connect from mail-qy0-f177.google.com[209.85.221.177]
May 9 07:25:45 withfrosted postfix/smtpd[21095]: 26CE516241D: client=mail-qy0-f177.google.com[209.85.221.177]
May 9 07:25:45 withfrosted postfix/cleanup[21104]: 26CE516241D: message-id=<z2pe336661a1005090425zaee8dc71jc3002cb7cb25e0fa@mail.gmail.com>
May 9 07:25:45 withfrosted postfix/qmgr[19083]: 26CE516241D: from=<issact@gmail.com>, size=1866, nrcpt=1 (queue active)
May 9 07:25:45 withfrosted amavis[21024]: (21024-01) (!)connect_to_sql: unable to connect to DSN 'DBI:mysql:database=mail;host=127.0.0.1;port=3306': Can't connect to MySQL server on '127.0.0.1' (13)
May 9 07:25:45 withfrosted amavis[21024]: (21024-01) (!!)TROUBLE in process_request: connect_to_sql: unable to connect to any dataset at (eval 98) line 241, <GEN15> line 5.
May 9 07:25:45 withfrosted amavis[21024]: (21024-01) (!)Requesting process rundown after fatal error
May 9 07:25:45 withfrosted postfix/smtp[21105]: 26CE516241D: to=<admin@withfrosted.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.2, delays=0.11/0.01/0.01/0.07, dsn=4.3.2, status=deferred (host 127.0.0.1[127.0.0.1] said: 421 4.3.2 Service shutting down, closing channel (in reply to RCPT TO command))
May 9 07:26:15 withfrosted postfix/smtpd[21095]: disconnect from mail-qy0-f177.google.com[209.85.221.177]

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Ubuntu Security :: Postfix - Not Critical - SMTP Server: Errors From Unknown [ip Address] In Local Recipient Table

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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Software :: Virtual Users - In Postfix Server While Configuring Outlook For Receiving Mails?

Mar 21, 2011

I have configured dns, postfix, dovecot, https, squirrel mail on fedora11 everything working very well. While configuring out look the same domain users getting mails the virtual users not receiving mails it showing pop3 error. But he can able to receive mails in his home directory.

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Networking :: CentOS Mail Setup - Sendmail Via External SMTP Server

Jul 30, 2011

I am setting up a CentOS box as a NAT firewall that needs to also send mail. It needs to send this mail using an outside provider's SMTP. The provider requires SMTP over SSL. None of the machines inside the NAT will ever send mail except via the provider's SMTP nor will they ever receive mail except to local clients via the provider's IMAP servers.

So for the example the machine is TESTMACHINE. There is one internet facing ethernet port connected to a DSL modem via pppoe.

The SMTP it needs to send mail via is mail.host.net which requires SMTP over SSL (port 465) and username/password authentication.

The sendmail documentation is quite confusing on how to get this simple setup operating, so an example showing the appropriate changes to sendmail.mc and other require config files.

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Server :: Forward Root Mail To External Account Requiring Smtp Authentication?

Nov 3, 2010

I have one Centos Server and I want to forward root mail to 1 external account: [URL] I installed sendmail and created /root/.forward with this content: [URL] and I sent a test mail with this command: /usr/sbin/sendmail root <prueba.txt But nothing was forwarded.

After that I ran the same command with the verbose option:

/usr/sbin/sendmail -v root <prueba.txt

And this is the output:

root... Connecting to [127.0.0.1] via relay...

220 localhost.localdomain ESMTP Sendmail 8.13.8/8.13.8; Wed, 3 Nov 2010 21:09:39 -0600
>>> EHLO localhost.localdomain
250-localhost.localdomain Hello myfriend [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES

[code]....

For some reason sendmail tried to connect to example.com smtp server and couldn't reach it. I am sure this is because the smtp server for example.com domain is not example.com is mail.example.com. Besides mail.example.com requires authentication, username , password and the smtp port is not the default 25 is 9999. configure sendmail to forward root mail to a smtp server that requires authentication, username, password with a not the default 25 port?

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Server :: Server Configuration For Small Office Server, Which Smtp, Pop Imap Server And Backup?

Apr 2, 2010

I have installed a linux server in my office to run 16 machines. Its main use will be a internal mail server but will be also running websites.

I have installed Ubuntu 9.10 server x64 and have got apache running.

I am looking for the simplest more robust solution for smtp, pop3 and imap. I have only ever used qmail before and found it a pain to configure and its getting old so I though I should probably try something new. I have not much experience with running pop3 or imap on linux so would love a suggestion on that.

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General :: Postfix Giving "SMTP Server Error: 5.5.0 Sender Already Specified"

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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Server :: Postfix Not Delivering Mail To External Domains?

May 23, 2009

i have configured postfix to deliver mail from an internal mail server to external domains... however i keep getting this errors

Code:

un 10 23:23:59 smtpserver postfix/local[28831]: 7800CF0058: to=<root@smtpserver.domain>, orig_to=<postmaster>, relay=local, delay=0, status=sent (delivered to mailbox)
Jun 10 23:23:59 smtpserver postfix/qmgr[5989]: 7800CF0058: removed
Jun 10 23:25:19 smtpserver postfix/smtpd[28824]: connect from unknown[192.168.5.22]

[code]....

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