Questions tagged [postfix]
Free and open source mail transfer agent (MTA) that routes and delivers email. When asking about postfix problem, please include the relevant maillog lines and output of the following command: `postconf -n` (non-default content of main.cf) and `postconf -M` (content of master.cf)
610
questions
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How to configure postfix to pipe all incoming email to a script?
Using postfix, I'd like all incoming mail, to any address (including those that don't map to local users) to be piped to a script. I've tried configuring mailbox_command in /etc/postfix/main.cf:
...
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69
votes
6
answers
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Forcing the from address when postfix relays over smtp
I'm trying to get email reports from our AWS EC2 instances. We're using Exchange Online (part of Microsoft Online Services). I've setup a user account specifically for SMTP relaying, and I've setup ...
- 1,167
40
votes
8
answers
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Why Does hotmail still reject my emails?
I have a very strange problem with my emails being marked as spam by hotmail.
I just have configured Postfix + Dovecot on my server and all works perfectly. I can Send/Receive emails. I only have ...
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votes
7
answers
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How to correct Postfix' 'Relay Access Denied'?
This morning, in order to correct a problem with a name mismatch in the security certificate, I followed the recommended steps from How to fix mail server SSL?, but now, when attempting to send an ...
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votes
5
answers
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How to make Postfix use another IP address?
I'm using the Postfix mail server and I have 6 IPs available. I'd like to use another IP for the Postfix mail server for sending mail than the web server uses.
How can I do this? My postfix version ...
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17
votes
3
answers
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How to collect bounces in postfix
This is related to this question:
linux - Ways to get a bounceback report for my newsletter application? - Server Fault
Let's say I'm generating email addresses like this when I send out ...
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47
votes
5
answers
51k
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"No worthy mechs found" when trying to relay email to Gmail using Postfix
I've been trying to configure email to forward to Gmail, using Postfix to relay email to smtp.gmail.com. However, I'm failing to get it to authenticate with smtp.gmail.com, which is a rather vital ...
- 1,271
33
votes
2
answers
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Confused about alias_maps and virtual_alias_maps
I have already re-read the docs on this as well as other posts here and this is still very unclear to me. I have been testing various things to understand the difference between alias_maps and ...
- 1,481
18
votes
3
answers
18k
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How to enforce sender address to be "[email protected]" in Postfix?
I have set up a Postfix server with SMTP AUTH (STARTTLS on port 587). All my users are in the domain "example.org". I want to enforce the sender address to be "[email protected]".
I learned ...
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42
votes
4
answers
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DKIM sign outgoing mail from any domain (with Postfix and Ubuntu)
I got DKIM setup on my mail server (postfix and ubuntu) so it signs outgoing emails. I used these instructions:
https://help.ubuntu.com/community/Postfix/DKIM
However, I need it to sign emails from ...
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34
votes
1
answer
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What's the difference between postfix/smtp and postfix/smtpd
A bit confused when reading through the logs of my smtp/mail server, I'm turning this questions to you guys.
In the maillog files I'm seeing entries for postfix/smtp as well as postfix/smtpd. I can ...
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21
votes
3
answers
41k
views
Postfix disable local delivery
Is there any form to prevent local delivery on a postfix server?
Ideally, I want to avoid local delivery to some domains, because this postfix server is a google apps backup one.
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21
votes
5
answers
31k
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Remove/hide client sender ip from postfix?
I'm trying to hide the client IP from emails sent from postfix.
here is an example of what I mean:
Received: from mail.[removed].com (adsl-75-37-61-254.dsl.frs2ca.sbcglobal.net [75.37.61.254])
(...
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votes
4
answers
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Postfix: how to use simple file for SASL authentication?
I'd like to run Postfix on a Debian VPS to send e-mails from my application. The application (running on other VPSes) would connect to Postfix via SMTP. Postfix does not have to handle incoming email; ...
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votes
4
answers
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Block outgoing mail to specific address using Postfix
How could I block outgoing mail to a specific address using Postfix?
I've partially managed to block outgoing e-mail using header_checks. However, header_checks
doesn’t cover BCC.
I also tested ...
- 313
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votes
3
answers
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mail loops back to myself | postfix
Hi I have an issue with bounced mail it does not happen all the time but at the same time is very frequent. Most of the time if I send an email to an address that does not exist then i get a bounce ...
10
votes
1
answer
24k
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postfix multiple IP SMTP banner
I've installed postfix 2.11.3 and we have multiple IP addresses on our server which we want to host two domains, isolated and running on their own IPs.
domain1 unix - - n - - ...
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9
votes
6
answers
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postfix fails to send mail with "fatal: unknown service: smtp/tcp"
I have installed postfix, and when I tried to send a mail to gmail it told me that it has been sent, but when I checked my inbox in Gmail I didn't saw it.
This is how the connection looked like:
$ ...
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9
votes
1
answer
40k
views
Configure Postfix to send/relay emails Gmail (smtp.gmail.com) via port 587
Using Centos 5.4, with Postfix. I can do a
mail [email protected]
subject: blah
test
.
Cc:
and the msg gets sent to gmail, but it resides in the spam folder, which is to be expected.
My goal is to ...
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votes
7
answers
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postfix - how do you redirect all emails to one user, eg *@example.com → [email protected]
I'm using postfix for my email. I know I can use /etc/aliases and newaliases command to redirect certain email, eg I can redirect [email protected] to [email protected] by putting root: user in my /etc/...
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23
votes
7
answers
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Postfix aliases and duplicate e-mails, how to fix?
I have aliases set up in postfix, such as the following:
[email protected]: [email protected], [email protected] ...
When an email is sent to [email protected], and any of the recipients in that ...
- 339
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votes
1
answer
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How can I configure Postfix to retain copies of all email sent through it?
My company currently uses Google Apps for email. I can configure Google Apps to forward all outgoing email through a relay server. I can also point my MX records at this server and have it forward ...
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11
votes
5
answers
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Relay host based on destination MX record
I wish to set up Postfix to use an external relay depending on the destination hostname, ie:
If destination hostname is *.outlook.com, use relay some_smtp.example.com
If any other destination ...
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11
votes
4
answers
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views
Postfix check outgoing mail for spam
How can I force postfix to check (and log/flag/etc) all outgoing mail for spam?
Just want to make sure I'm doing my part on my servers.
EDIT: Postfix config, as requested.
main.cf
# See /usr/share/...
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9
votes
1
answer
41k
views
Postfix to relay mails to other SMTP for particular domain
Have an SMTP server setup running in postfix, only for sending mails . Now the requirement is i want to relay mails for particular domain to end user through other SMTP , without disturbing default ...
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votes
3
answers
16k
views
Why does Postfix deliver mails locally instead of relaying them to Google Apps?
I get the following error trying to send an email to my Google Apps Email at [email protected] from my Postfix server.
to=, relay=local, delay=0.09, delays=0.07/0/0/0.02, dsn=5.1.1, status=bounced ...
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votes
2
answers
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How do I get Postfix to deliver ALL mail to a custom script?
I am trying to configure postfix so that ALL mail that arrives (to any domain) is piped into a shell script that I have.
I have tried several things, including setting
mailbox_command = ...
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votes
2
answers
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Postfix REJECT (not BOUNCE) unknown virtual aliases
We run a small postfix (and dovecot) mail server for a number of hosted domains, using virtual alias maps and with spamassassin configured.
Recently it's become apparent that we're generating some ...
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votes
1
answer
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postfix header_checks using regexp proper setup
I just can't seem to figure out why header_checks are not being evaluated.
I'm on Ubuntu 12.04, postfix 2.7, dovecote, spamassasin, clamav, amavis.
I add following line to /etc/postfix/main.cf :
...
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votes
1
answer
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How can I set up Postfix so that all email sent on my dev box gets routed to the developer email group?
I have a development server, and at the moment email is disabled on it, so we can do whatever we need to with the system without worrying about accidentally emailing clients' customers.
I'd like to ...
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votes
2
answers
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Use different relay in postfix
In our application, we send different kind of mails. On a broad view we can generalize it in two category,
Mails which monitor the health of the app.
Mails which we send to end user.
Is there any ...
2
votes
2
answers
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views
postfix relay based on origin
I have 4 servers. prod1.example.com, prod2.example.com, dev1.example.com, and dev2.example.com. They all send their mails to smtp.example.com. This server does the relay. Now I want that dev1 and dev2 ...
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vote
1
answer
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How can I prevent Postfix from accepting mail from domains it owns, that it didn’t send?
I have Postfix configured with a few domains, delivering to Dovecot locally.
I’ve noticed some interesting spam that comes in, purporting to be from an address at one of those domains, but that ...
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1
vote
1
answer
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views
Postfix forwards to Gmail being rate limited even with unmodified headers
I've installed Postfix on Ubuntu 14.04 with the defaults. I then configured some virtual aliases to forward email from a few addresses to various personal (mostly Gmail) accounts. This is just to make ...
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121
votes
1
answer
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views
What ports to open for mail server?
I have just finished setting up a Postfix mail server on a linux (ubuntu) platform. I have it sending and receiving email and it is not an open relay. It also supports secure smtp and imap.
Now this ...
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votes
5
answers
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views
Is Postfix the same thing as Sendmail?
I have Postfix setup on my server so that I can send outgoing mail using the command-line:
mail -s "Subject" [email protected]
Is this using Sendmail or Postfix ?
Is "Sendmail" just a software ...
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45
votes
2
answers
48k
views
Understanding a Postfix log file entry
We have a Postfix hub and I'm trying to better understand the information in the mail.log file. I use tools like qshape, pflogsumm.pl and amavis-logwatch to summarize the log files, but I have still ...
- 901
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votes
5
answers
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Changing the maximum mail size in Postfix
When sending large email to a new CentOS6 server running Postfix as the MTA, the following message is returned:
tried to deliver your message, but it was rejected by the recipient domain. We ...
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28
votes
5
answers
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Postfix - Host or domain not found
I've just installed Postfix on my Ubuntu, on a local network.
On this network, I have an Exchange Server (using domain mail.example.com).
I had a problem sending an email to a local address: adress@...
- 405
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votes
5
answers
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views
Dovecot user lookup fails when using username@domain format
I have Dovecot v2.0.11 installed on a FreeBSD server and the user lookups for incoming email addresses are failing, but lookups for system users is successful.
Dovecot is setup to use system users, ...
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votes
6
answers
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views
How to build a high availability Postfix system?
I'm needing to set up a remote mirror for a postfix server (where the content of both mail servers should be the same at any time).
The idea is that if the main server comes down at some point the ...
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votes
2
answers
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When does Postfix use IPv6 and when IPv4?
I've configured my mail server for IPv6 and IPv4 but in the most cases it uses IPv4 while IPv6 is available on the remote host. I use Postfix in version 2.9. So my thought was that postfix uses IPv6 ...
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votes
3
answers
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How to redirect all outgoing email from postfix to a single address for testing
I am setting up a testing server for a web based application that sends some email notifications.
Sometimes testing is performed with real customer data, and for that reason I need to guarantee that ...
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votes
3
answers
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Configuring outgoing mail to port 587 on Ubuntu/Postfix
I'm configuring a backup server on a local network that has a cable connection. The Cable ISP is filtering all port 25 (smtp) traffic.
uname -a
Linux myhost 4.4.0-119-generic #143-Ubuntu SMP Mon ...
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votes
5
answers
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Outgoing only SMTP server
I want to setup an outgoing only SMTP server on Debian, so my Web-applications will be able to send e-mails via it. I don't want to use another hosts because of security and customizability of my own ...
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votes
2
answers
14k
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How to redirect all mail from one domain to another in Postfix?
I have two forms of the same domain name, one being a common misspelling of the other, let's say tedswidgets.com and tedswigets.com.
I'd like to redirect all mail for <someone>@tedswigets.com to ...
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votes
1
answer
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"unsupported dictionary type: pcre" postfix header_checks
I have the following header_checks in place on Postfix
/^Received:/ IGNORE
/^X-Originating-IP:/ IGNORE
/^X-Mailer:/ IGNORE
/Message-Id:\s+<(.*?)@www.mainserver.com>/ REPLACE ...
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votes
1
answer
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postfix: relay access denied. How to fix it?
I've been fiddling with main.cf file for a long time but still couldn't find why. I've set up an email server with this tutorial Email with Postfix, Dovecot and MariaDB on CentOS 7
This is the part ...
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votes
1
answer
18k
views
Postfix/Dovecot - Multiple Domains and Multiple Linux Accounts
I have been trying to setup a new mail server to migrate from my VPS, as my host has decided to close its doors. The old server was running Exim/Courier (nearly a decade old at this point,) and I'm ...
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votes
3
answers
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Add email account to postfix
I have add a user in linux called "mailer". I'm only using this user to send outgoing mail, not receive. What do I need to do in order use the following SMTP information to send outgoing mail?
$...
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