Postfix is a free and open-source mail transfer agent (also "MTA"), written in 1997 and still actively developed.

learn more… | top users | synonyms

1
vote
2answers
3k views

Fatal error (bad field count) while configuring Postfix

I'm using this tutorial to configure a mail server using postfix, dovecot and mysql. While configuring Postfix I have to uncomment the following lines and then restart Postfix with service postfix ...
1
vote
0answers
3 views

Postfix with Relay and fetchmail

I have a server with Zarafa, Postfix and fetchmail. I have a local domain: mylocaldomain.com The local domain is configured on my server as mydomains on postfix. So every mail to @mylocaldomain.com ...
0
votes
0answers
14 views

Setting up email server with postfix

I am setting up an email server on Amazon ec2 running Ubuntu 14.04 using postfix. I am trying to have emails come from: user@example.com In postfix, I have the following set inside ...
0
votes
0answers
8 views

Configure Postfix as backup MX AND local delivery for the same mailbox [migrated]

I try to explain better... Actually I have a standalone mailserver (CentOS7+postfix+dovecot) that provide some mailboxes for my domains and I want to add a Backup MX. As said in lot of doc ...
0
votes
1answer
22 views

postfix redirect mail to transport going round relayhost

I have worked correctly postfix with this setting: main.cf smtp_sender_dependent_authentication = yes sender_dependent_relayhost_maps = hash:/etc/postfix/relayhost_map transport_maps = ...
0
votes
1answer
14 views

postfix gateway reject incoming spoofed emails from my domain

I have a postfix gateway. It only allows emails from the outside to a list of internal users in mydomain.com and it allow emails from my internal mail server to go out to the internet. There is no ...
0
votes
1answer
13 views

Where is the email address for maillog set?

I've got a CentOS 6.7 system that currently emails a certain address to send system messages (for example, it emailed with the body "Terminated" to indicate a process spawned by cron that was killed ...
0
votes
1answer
30 views

Postfix problems sending mail to gmail addresses

I have just installed Postfix and while recieving email seems to work fine, I have trouble sending email. When I send mail to an address provided by my ISP, the mail gets delivered successfully. The ...
0
votes
1answer
3k views

PHP mail() function not working in Mac OS X

I did follow all the links given in this post, nothing worked out. Please explain me why PHP mail() does give so much problem? what exactly happening and why it will not work? I am using Mac OS X ...
0
votes
0answers
7 views

Postfix: reprocess mails placed in wrong inbox (/var/mail/nobody) due to misconfiguration?

Due to a misconfiguration of $mydestination and virtual alias maps, all my server mails were placed into /var/mail/nobody by postfix. Can I reprocess these mails via postfix and send them to the ...
0
votes
1answer
9 views

Postfix ignoring virtual alias in MySQL database, returns error “Unknown user”

I set up a Postfix email server over a year ago following this guide: https://www.howtoforge.com/virtual-users-and-domains-with-postfix-courier-mysql-and-squirrelmail-debian-wheezy. The server has ...
0
votes
1answer
39 views

Mails to Microsoft's servers rejected

When I send an email to any Microsoft address it's instantly rejected. Searching for a while I find that only MS servers blacklist my IP, and I need to go to JMRP and ask them to remove it: ...
0
votes
0answers
22 views

Trouble setting up mail server(postfix, dovecot) on centos

I'm having trouble setting up my mail server, i have followed this tutorial: http://www.krizna.com/centos/setup-mail-server-centos-7/. Now i'm trying to send mails to my outlook adress, but i can't ...
0
votes
0answers
29 views

Migrate emails to new server but prevent Outlook from re-downloading them

I have a sendmail server that is nearing end-of-life. I need to move all email accounts to a new server (postfix), but I don't want Outlook users to re-download all their existing messages after the ...
0
votes
1answer
45 views

git-send-email Causes “Must issue a STARTTLS command first” Error

I am attempting to send a patch with git-send-email through my Postfix mail server. Unfortunately, whenever I do, I just get this error spat back to me: <recipient@example.com>: host ...
0
votes
0answers
14 views

How do I eliminate the hostname from HELO greeting of postfix?

According to http://www.postfix.org/BASIC_CONFIGURATION_README.html, postfix should derive $myhostname if you set myorigin = just the domain name, however I haven't found that to be the case. I did ...
0
votes
1answer
37 views

How do I get opendkim to sign emails?

I am running on a ubuntu 14.04 VPS and am having trouble getting opendkim to sign outgoing emails. Also, I do not understand the results from dig -x, and I'm not sure my VPS provider entered the rDNS ...
0
votes
1answer
15 views

Alternative postmaster address if first fails

I am using postfix to send status reports about my server to an external email address. If the delivery fails the postmaster is informed. It's address is defined in /etc/aliases with something like ...
0
votes
1answer
27 views

postfix: how to generate a bounce

Is there a way to generate a bounce programmatically? The only thing I found is "-N" flag in sendmail wrapper and bounce_template_file configuration parameter: /usr/sbin/sendmail -N failure But for ...
0
votes
0answers
24 views

Piping Postfix messages to a script

I have googled and found many instances of people asking this same question, but none of the hits has helped me. Coming from qmail, I thought that Postfix would be easier. I have Postfix installed on ...
0
votes
1answer
9 views

Multi-Email Address Forwarding Not Working

I am using POSTFIX on my CentOS server box to do email forwarding. The goal is to be able to create some simple forwarding addresses for the multiple domains on this box to route mail to a single ...
0
votes
0answers
4 views

Configuring postfix to work with TLS

I have a couple of questions regarding postfix config. First of all I need TLS as of the perl smtp plugin mediawiki uses, forces TLS authentication. Will it work on 25? Or what's the advised port? ...
0
votes
0answers
25 views

Postfix configuration: bypassing a relayhost under certain conditions

We have a simple email system that uses Postfix to forward on emails sent to our accounts to our gmail accounts. This is achieved through virtual_alias_maps in main.conf and a corresponding file that ...
0
votes
0answers
19 views

How to make Postfix chain multiple accounts in recipient_bcc_maps

recipient_bcc_maps works fine for 1 level of recipients but it does not chain multiple recipients. For example: # cat recipient_bcc_maps recipient1@example.com recipient2@example.com ...
0
votes
0answers
19 views

How to make Postfix to bcc of incoming mail when the mail is delivered to an alias

When you configure recipient_bcc_maps straightforward, it works fine. But when an email is delivered to an alias that is defined in virtual_alias_maps, which can be either a name alias or a domain ...
0
votes
0answers
52 views

Hold outgoing spam by header in postfix

I would like to hold outgoing spam emails by checking the X-Spam-Flag header. I tried with smtp_header_checks (/^X-Spam-Flag:\s+YES/ HOLD), but it doesn't allow HOLD. I don't want to discard it ...
1
vote
0answers
11 views

Is it possible to tell Postfix to keep full emails for (e.g.) a week after they are sent?

Our mail server was recently blacklisted because a web server was infected with a spamming virus. We discovered and blocked the guilty sender only after we started inspecting the message bodies of ...
0
votes
0answers
59 views

Configure Postfix to reject mails with invalid DKIM signature

I have configured Postfix to sign my mails using OpenDKIM. (I followed this tutorial.) Now I would like to configure Postfix to reject mails for domains that have DKIM configured and the mail lacks a ...
2
votes
3answers
1k views

Using supervisord to control the postfix MTA

I am trying to use supervisord to control postfix. The usual method is to specify a command which starts the daemon, I use postfix -c /etc/postfix start. The postfix man page says that to stop you ...
1
vote
1answer
324 views

postfix: block mails to a specific and non existent mail address

How could I block mail to an incoming address that spammers are hammering via postfix? I have a webmin interface to postfix, so if this can be done via webmin interface that would be great.
1
vote
1answer
35 views

postfix + dovecot configuration, no mails received

I'm trying to install a postfix + dovecot mail server on my own server and have trouble receiving mails. I followed this tutorial ...
0
votes
0answers
36 views

Roundcube not sending email via smtps

I am running Roundcube 1.1.4 on Debian Jessie - it all works OK apart from sending emails via my SMTPS server (which normally works OK). I use self-signed certificates. No additional Roundcube plugins ...
1
vote
1answer
151 views

Ubuntu postfix sendgrid unknown mail transport error

I have configured postfix similar to this one: "Recipient address rejected" when sending an email with sendgrid $ /etc/postfix/main.cf smtp_sasl_auth_enable = yes smtp_sasl_password_maps ...
0
votes
0answers
16 views

External mail from windows get rejected, local mail works

I have linux server with working SMTP server (postfix)... (I can send emails to gmail when connected to it via ssh) But if I send through bmail in Windows i get this in linux mailq: BB986640FC9 ...
1
vote
1answer
60 views

How can I prevent that an user sends mail like another user on Postfix?

I am running a Mail Server on CentOS 7. All programs and system are up to date. My Mail Transfer Agent is Postfix, and it uses Dovecot SASL to authenticate the users. In Postfix's configuration, my ...
0
votes
0answers
65 views

Building a local mail server using postfix + dovecot + apache + squirrelmail on ubutnu server 15.10

i followed this tutorial to setup the mail server : http://www.tecmint.com/setup-postfix-mail-server-in-ubuntu-debian/ I managed to install and configure all the softwares , at the end i can send ...
0
votes
0answers
46 views

CentOS - Postfix rejects incoming mails

I have VPS with Centos 6 with Postfix, Exim and Dovecot. When I try to send mail from GMail to mail account from my server I receive following error in /var/log/maillog: Feb 3 13:36:29 mobilepro ...
6
votes
0answers
831 views

Connection timing out when connecting to Milter service [closed]

I'm using a VPS with CentOS 5, containing Postfix and OpenDKIM. I have set up OpenDKIM using this guide. Everything seems to work properly as the log in /var/log/maillog does not report anything other ...
1
vote
1answer
33 views

Giving each domain unique IPV6 address for posfix SMTP

Today I faced a problem after setting up postfix as my mailserver and sending e-mail to a gmail email, which responded me with the following message: Our system has detected that this ...
0
votes
1answer
88 views

How do I resolve postfix installation issues?

There is some problem with postfix. When i try to remove it so that i can reinstall: learner@juggernaut:~$ sudo apt-get remove postfix Reading package lists... Done Building dependency tree ...
2
votes
1answer
360 views

Signing-milter / SMIME - how are this email signed incorrectly?

I have a problem with signing-milter (http://www.signing-milter.org). The problem is that the -b flag is required, and the -b flag is not recommended because it outputs non-RFC compliant email. ...
1
vote
2answers
100 views

Am I an Open Mail relay? Cent OS with Postfix, Dovecot,

After some time I build up an E-Mail Server again. I looked up different tutorial to do it right. I did it right or at least I can send and receive E-Mails. The most important thing for me is that ...
0
votes
2answers
4k views

Postfix SMTP SSL config: Can't send email but can receive it with SSL

I am trying to finish configuring my postfix/dovecot mail server that sits behind my home's router/firewall. I'm on Mint/Ubuntu 12.04. I'm close. I can connect/retrieve emails via SSL but can only ...
0
votes
0answers
35 views

Postfix/Milter: Is it possible to avoid queueing a message but accept?

I am trying to use postfix to capture certain emails, process it out on milter (before queue filter), accept the message. But I don't want it to be queued into the mailbox (no need for the message to ...
0
votes
0answers
61 views

What are the potential and abilities of a MTA (postfix, exim, …)?

I'm trying to learn how to set a server using Postfix, this is a very complex craft and I can't grasp yet the full potential of this tool. I would need to know if it can do these actions : John Doe ...
6
votes
3answers
10k views

Changing default from e-mail address for system accounts when using sendmail

I would like certain system accounts (root and www-data) to have the header From: Example Company <noreply@example.com> when e-mail is sent using either the mail or sendmail commands, or from ...
0
votes
0answers
9 views

setting mx record on own domain

i have question about setting mx record. as i researched, mx record should be point A record that point actual remote address to connect. i am using amazon linux, and i installed postfix in my ...
1
vote
0answers
38 views

postfix to send email from a client

I own a domain company.com. All employees in company have gmail accounts. The domain registrar already provides email forwarding, so if I were to send something to bob@company.com, it would be ...
1
vote
0answers
75 views

PostFix Issue When Sending Emails through Outlook

I also have the Relay access denied issue and it's really disturbing me. I can send and receive normally from the web mail. However, when I configure the email on [B]Outlook [/B]without using ...
2
votes
3answers
4k views

CentOS 6 - Inodes full - can't delete folder containing files

I have a CentOS 6 server at rackspace with 40GB of space. My server kept crashing with 'no space left on device' errors but there is over 50% free. When I run df-i this is the output: /dev/xvda1 ...