Ubuntu Servers :: SMTP Relay - How To Configure Postfix

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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Ubuntu Servers :: Virtual SMTP With A Postfix Relay - Configure The "Relayer MTA"?

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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Fedora Servers :: Relay Access Denied 554 5.7.1 (postfix And Smtp)

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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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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Slackware :: POSTFIX And SMTP Relay Denied

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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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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Server :: Configure Postfix To Relay Mail To Multiple Internal Mail Servers With Different Domains?

Aug 6, 2010

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.

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Ubuntu Servers :: Setting Up Authenticated SMTP Relay?

Jun 15, 2010

I am new to the Ubuntu Community and just starting to build my Ubuntu 10.04 Server. I am a novice in Ubuntu, though maybe not a full n00b any more

I travel around a lot with my laptop, (also Ubuntu 10.04). However, my ISP does not allow me to send email via their SMTP when I am not in their IP range.

Since I have this little server I am building, I thought it would be nice if I could have my own SMTP relay. The objectives would be simple:

- I do not need a mailbox or POP server (yet).
- I wish to send email from any place in the world. I can not use a filter on IP ranges or local networks only.
- If my server could do this, I just configure Evolution on my laptop to send mail to my home IP address, using some sort of authentication and/or security/encryption (whichever is easy to implement).
- My server then just forwards my mail to my ISP. Since the server is inside the IP range, it can be handled as usual.

I have been digging through several howto's and the ubuntu server guide, searching some forums etc. Even while I don't fully grasp the things explained, I can't get the idea that one of those is "Just what I need".

Even still, if there is some other service outside my own that can do this (a public SMTP relay maybe?) I would also be happy to consider as long as it is safe and does not "eavesdrop" on my messages.

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Ubuntu Servers :: SMTP 554 5.7.1 : Relay Access Denied

Aug 18, 2010

I have setup my own home server . All the applications are working perfectly except one I can't send Emails. I check weda my smtp has any errors not welll I got this

Code:

SMTP -> FROM SERVER:
220 server1.example.com ESMTP Postfix (Ubuntu)
SMTP -> FROM SERVER:

[code]....

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Fedora Servers :: Set Up An External SMTP Relay Box?

Jun 29, 2011

I've tried googling this, and am having trouble finding something that doesn't end up being dizzying or confusing.

I was wondering if anybody could provide me with a concise, conclusive answer/guide.

I have a set of servers which require redundant SMTP relay. The first two of their SMTP relays are their own SMTP servers, and as such, are not dependable in the event that their network/servers go down. Their monitoring software runs on their machines as well, and uses the SMTP servers they themselves host.

I need to set up an external SMTP relay box that they can use to relay their monitoring alerts/admin notices in the case that their mailservers go down.

I have a company exchange server with pop/imap support @ my disposal but, unfortunately, that box runs Windows and does not permit any changes to services or additional software to add for the purposes of relaying clients.

So now, I need to create a dedicated linux box that can act as a relay to send email coming from the monitoring/admin/alert software in case their first two smtp servers have gone down.

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Ubuntu Servers :: Mail SMTP Relay / Copy All Traffic To Another Port For Monitoring?

Sep 2, 2010

I'm running ASSP on Ubuntu 10.04.1 it's mostly working fine. I have one problem which has been bugging me for some time. I don't want to filter outbound mail, but if I can relay (proxy) my outbound mail through ASSP, then it can automatically add to the whitelist.

As ASSP is a proxy, I need a server to send it to once ASSP receives it. I've tried my ISP, but this failed and they weren't willing to confirm if a connection attempt was received at their end.

Current setup

Inbound

mx -> router -> ASSP -> Exchange 2003

Outbound

Exchange 2003 -> mx

I'd like to setup outbound as either

Exchange 2003 -> ASSP -> <ISP> SMTP relay
Exchange 2003 -> ASSP -> <relay running on Ubuntu eg postfix>

Can anyone help me with troubleshooting steps or a better suggestion for how I can set this up. I'd love to know why my ISP setup didn't work, but I don't know a tool for monitoring IP traffic in Ubuntu SE, in windows I use Wireshark is there any equivalent I can setup for Ubuntu or a tool I can use in windows which will show all traffic, Ubuntu and windows server are on the same netgear switch, not sure it's smart enough to copy all traffic to another port for monitoring.

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Ubuntu Servers :: Noob Setup Simple SMTP Relay Contradiction In Terms?

Jun 7, 2011

Is the term a 'simple SMTP relay' a contradiction in terms?!I have an elderly Dell server on which I have just made a fresh install of 10.04 LTS server. I had 8.04 running on it for a long time, but I haven't tried an SMTP server before. It is a headless server with CLI (no GUI) and the latest version of Webmin installed.I have a basic LAMP server installed for a few websites using PHPbb and Joomla, and also I run a Mediatomb server for our household. When I installed I also chose to install mail services, but these remain masked behind NAT at the moment

I now want to set up an SMTP relay server so when I am working away and using different wifi points or my notoriously unreliable 3G dongle I can always send emails through the home server (from my iPhone and my laptop) rather than having to look up the SMTP server for each ISP of the place where I am working.

What I want is an authenticated server which takes my email and redirects it to my home ISP's SMTP server. I need only 3 authenticated users to have access (myself, my wife and my son). I don't need (or want) any incoming mail services at all.

Useful modules installed are: Dovecot, Postfix, Procmail mail filter, PAM - but how do I set them up?

Is there any simple setup that I could do, preferably through Webmin, but I can handle CLI if necessary?

I have looked at the Ubuntu help pages, but it looks so complicated to set up something that seems like it should be so simple to me.

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Ubuntu Servers :: Nullmailer Relay Through The Postfix?

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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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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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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Ubuntu Servers :: Postfix Relay Mail For Local Users?

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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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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Ubuntu Servers :: Setup Postfix To Relay Email It Cannot Deliver Locally?

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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Ubuntu Servers :: Postfix SMTP Not Working

Apr 7, 2010

I've got a server running 9.10, and I'm having a few issues with SMTP. It's got Postfix and Dovecot installed, and eventually I'll add content filtering, but I need to get past this issue first.

I know there's a lot of posts out there for Postfix issues, but I haven'tbeen able to find one specific to my issue.

IMAP and POP3 work fine through SSL, and the server can send mail without any problems. That's all fine and dandy, but I need to utilize an e-mail client (like evolution or outlook). Everytime I set up a user in Evolution, the smtp connection times out, or is refused. I know it's not a firewall issue. Port 25 is open, as well as 465. So I should be able to connect through SSL. I want to be able to connect through SMTP using the same credentials as IMAP.

Here's my main.cf file:

Code:
myhostname = mail.adamwgay.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname

[Code].....

everytime I get things rolling, this issue pops up. I don't know if it's something I'm setting up wrong in the client, or if it's a configuration error on my part in postfix.

I'm also having a bit of an issue with my aliases. I've basically got a lot of addresses going to root, then root going to the main user, but it's not actually delivering the mail to the main user. It sends it straight to root.

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Ubuntu Servers :: Outbound SMTP Via Postfix

May 26, 2010

I have just built an internal postfix server for sending mail only, it's not accessible outside our network. I will be sending from our domain, Rewriting the from field to abc.com is turned on in the postfix config. A friend is telling me this will not work as they will do reverse lookups on our domain. What does this mean? Obviously the domain the email is sent from is a valid domain. If they do a lookup from the IP the mail came from it would be global crossing, our internet provider? These outbound emails are critical client reports, I want to make sure they are not seen as spam.

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Ubuntu Servers :: Use PostFix As SMTP For Joomla?

Jan 2, 2011

I am setting up an ubuntu server, in order to use it with Joomla.

Does someone knows if is possible to use PostFix as SMTP server for Joomla?

If does; would be necessary to install IMAP or POP3, Webmail etc if I just want to send automatics mails via Joomla.

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Ubuntu Servers :: Smtp Relay - "invalid/host-not-in-DNS Return Address Not Allowed"?

Mar 8, 2010

I installed the citadel suite on ubuntu server 9.10 Email obviously works fine internally. I tried to setup a smart host to send my mail through as my isp(Verizon) obviously blocks port 25. I tried to send out the Verizon smtp server on port 587. In the Administration> Domain names and Internet mail configuration>Smarthosts.My smarthost entry on the citadel configureation page above was usernameassword@outgoing.verizon.net:587 but after sending an outgoing email, it comes back with a "invalid/host-not-in-DNS return address not allowed"

I have also tried using gmail and a hotmail account with the respective smtp address's in but they come back with "Must issue a STARTTLS command first".I have researched both messages and come up with squat that has helped me.

I know that my mail will have to go out through a smarthost of somekind. So is am I on the right track with choosing verizon/gmail/or something else as my smtp relay, or is there a free service out there that I can send email through(haven't found one if there is)

Anyone else ever setup Citadel and got around their isp blocking port 25?I am also not sold on citadel, it was just the first/ nicest looking one that I found.

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CentOS 5 Server :: Configure Postfix On 5 To Relay Email From The Internet To The Exchange Server

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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Fedora Servers :: Allow All IPs To Use SMTP Running Postfix?

Sep 28, 2010

I want to allow all IPs to use my SMTP server running postfix. what should i write in mynetworks section?

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Ubuntu Servers :: Postfix Smtp Client Configuration For Port 465?

Jan 2, 2010

configuring my postfix server to send mail over smtps port 465. My ISP (as is the case with many ISPs), is blocking outbound SMTP, so I need to configure postfix to relay my mail out through my ISPs SMTP servers.

I was able to get it to work with gmail, which uses port 587, by using SASL: [URL] but that configuration is less than ideal as gmail drops the "reply to" address so when people receive my email, it looks like it's from gmail instead of from my server.

If I use my ISP SMTP servers as a relay the "reply to" address is not stripped, but the relay uses ssl over port 465 instead of TLS. According to the SASL readme:

Quote:

Postfix does not deliver mail via TCP port 465 (the obsolete "wrappermode" protocol). See TLS_README for a solution that uses the "stunnel" command.

I've looked at the TLS_README and can't figure out what I need to do. how to configure this?

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Ubuntu Servers :: Creating MailServer Using Postfix And Gmail SMTP

Mar 1, 2011

I recently created a webserver to host my website, using a Ubuntu 8.10 based system. (With some help from my experienced brother of course).I now want to create a mailserver to go along with my website. In setting up postfix to work with gmail smtp servers, I ran into a lot of permission errors.

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Ubuntu :: Gmail Relay And Post Fix / Send Emails With Postfix And Gmail As The Mail Relay?

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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Ubuntu Servers :: Postfix "Relay Access Denied" Error?

Jul 3, 2010

i have been working on setting up an email server over a ddns. All seems to be working (i can email me@my_ddns_domain.com to me@my_ddns_domain.com) except that when i try and send to another email address (some_other_me@other_host.com) i get the error "5.7.1 Relay access denied". The way i tested this is as follows:
Code:
me@my_ddns_domain:~/$ netcat my_ddns_domain.com 25
220 my_ddns_domain.com ESMTP Postfix (Ubuntu)
ehlo localhost
250-my_ddns_domain
250-PIPELINING

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Ubuntu Servers :: Postfix Relay - Exchange Sends The Mail Instead Giving Recipient Mail A Valid Reverse DNS Lookup

Jan 12, 2011

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:

[Code]....

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Ubuntu Servers :: Postfix / SASL Authentication For SMTP - KMail Cryptically Leaves With A Generic Auth Fail Notice

Aug 2, 2010

I have been faithfully following the postfix/sasl/etc install docs from [URL] and seem to have hit a minor snag with SASL authentication for SMTP. KMail cryptically leaves me with a generic auth fail notice and tailing the mail logs gives me

[Code]...

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