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" (content of main.cf) and/or "postconf -M" (content of master.cf)

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0
votes
1answer
19 views

Boot time log: 'Failed to start Postfix Mail Transport Agent'

centos 7.1 postfix 2.10.1 After restarting server in /var/log/messages during boot time Postfix noted only in these 4 lines (all actions during 1 second): systemd: Starting Postfix Mail Transport ...
6
votes
1answer
72 views

postfix performance with lists in main.cf

For defining a list of items to assign to many different options in postfix, you can either use a comma separated list like this: relay_domains = example.com,example.net,example.org or a hash map ...
3
votes
5answers
41k views

Postfix: Recipient address rejected: User unknown in local recipient table

When I try to send an email on my postfix server to an address on the same domain (for example, if the server hostname is mail.example.com and I try to send an email to test@example.com), I get the ...
-1
votes
0answers
5 views

Postfix AD Domain Connections Refusal

We have a postfix internal relay setup. We are seeing failed SMTP connections to our domain controllers. The logs show a connection to our domain root (hq.company.local) which sequences through all ...
2
votes
1answer
3k views

AWS SES: “Email address is not verified” error with Postfix relay

I've setup Amazon SES, verified my domain, and have been approved for Production mode. When an email from the outside world is sent to an address in my domain, my server forwards it back out to a ...
1
vote
1answer
22 views

OpenDKIM milter with Postfix

I just configured opendkim and postfix and it is supossed to be signing my emails but it doesn't. I used /usr/sbin/opendkim-testkey to test the keys and it seems to be ok with them but the mails I ...
1
vote
0answers
16 views

Why would an SMTP client send a RSET (Reset) command?

I’m trying to understand how exactly an email is processed by Postfix – and some of the finer details of SMTP mail transactions. My short-term goal is to debug a proprietary (binary, closed source) ...
0
votes
0answers
10 views

Run script when postfix not deliver mail

I would like to run some script when postfix can't deliver e-mail (because of 5XX error, or is expired from queue). How to do it? I tried to rewrite bounce script(defined as bounce in ...
2
votes
2answers
3k views

Postfix stop outgoing delivery but accept all incoming

I'm doing development for a webapp that sends emails out to users. I've typically used Argosoft Mail Server (Freeware) in a windows environment as an SMTP server in which I've enabled relay but ...
1
vote
1answer
15 views

SMTP server for testing purposes with a few specific requirements

As our company started doing development work on their on-line product they used a gmail address for testing purposes, using '+' notation to deliver all test e-mails to a single mailbox. Over time ...
-2
votes
0answers
28 views

Duplicate Emails after using SpamAssassin

I am using Postfix for mail purposes. I created email address like hello@example.com and forwarded it to 3 email addresses. Somehow I was getting lot of Spam, so I used SpamAssassin. Now the spam ...
0
votes
1answer
14 views

Postfix E-Mail transfer doesn`t work - SASL Authentification failed

I want to use the postfix MTA to send E-mails from my Nagios monitoring system to the contacts. However, i get the follwing error, if a mail will be send May 28 16:20:29 op5-system ...
-2
votes
1answer
14 views

postfix & dspam “Daemon mode failed to start ”

I'm experiencing this issue on my postfix/dspam/dovecot configuration: May 28 12:35:59 mx01 dspam[1514]: Creating local domain socket /var/spool/postf ix/dspam/dspam.sock May 28 12:35:59 mx01 ...
1
vote
1answer
49 views

Postfix mandatory smtp/smtpd vs “not mandatory” difference and configuration

Three questions: Correct me if I'm wrong: smtpd_tls_mandatory_ciphers => settings for incoming mandatory TLS encryption smtpd_tls_ciphers => settings for incoming opportunistic TLS encryption ...
0
votes
0answers
30 views

CentOS Postfix/Dovecot status deferred conversation with 127.0.0.1[127.0.0.1] timed out while receiving the initial server greeting

Linux Kernel: Linux 2.6.32-504.16.2.el6.i686 on i686 RAM: 6GB OS: CentOS 6.6 Postfix 2.6.6 Dovecot 2.0.9 Relay Host Verizon Stunnel through 127.0.0.1:2525 Webmin 1.750 Virtualmin 4.17.gpl Multiple ...
0
votes
2answers
31 views

Postfix spam abuse [duplicate]

I have a terrible problem, my joomla website is being abused to massively send spam. I have no clue on what is actually happening, but my postfix mail queue is constantly filled with thousands of spam ...
-2
votes
0answers
18 views

What DNS settings I need to do to create a direct internet mailer? [duplicate]

I'm wanting to create a direct mailer for a cluster of cloud servers using docker. I started off with a default installation of postfix and attempted to send email to myself. It arrived but was ...
0
votes
1answer
23 views

Postfix : How to reject sender addresses that don't exist only for local domains

On my Postfix I'm trying to reject senders that use fake addresses from domains managed locally. But I only want to perform the check for the local domains, not for every senders. So if example.com ...
0
votes
0answers
31 views

Route postfix through different ISP/Gateway

Our network has 2 different gateways/ISPs, one with a dynamic IP used mostly for web traffic and SQUID and another with a dedicated connection and a static IP to handle VOIP and email. The network ...
0
votes
0answers
21 views

Postfix treat all outgoing main as external [duplicate]

I have a setup with two mailservers for the same domain. First mailserver is the primary server and is running Hmailserver, this server routes undeliverable mails to the second server (running ...
-1
votes
0answers
27 views

Postfix: how to reject specific recipients in virtual alias domain that has catchall

I use my remote Postfix server (that currently relays for various remote hosts that have IP addresses only (no Domain Names)) to also act as a virtual alias host for my personal domain. Postfix's ...
0
votes
0answers
51 views

Add Disclaimer using alterMIME and Postfix on CentOS Linux

I need to configure Postfix to add a .JPG signature on all outgoing mail. I run postfix on CentOS Linux 7. I followed the document on ...
5
votes
1answer
855 views

Postfix: change sender in queued messages

Following a complete re-installation we got a problem with the configuration: the sender address was wrong and some recipients (mail servers) rejected them. So there is a bunch of mails stuck in the ...
1
vote
3answers
6k views

How to fix mail server SSL?

Our mail server was originally set up using self-created certificates. However when those expired, and I tried to recreate them, the whole thing just blew up. Since I know it will be important, we are ...
1
vote
1answer
33 views

Spamassassin Systemd Error

I am getting an error when trying to start spamassassin (for my postfix server). I think this error might be related to systemd as it worked before I installed the patch (I think). I followed the ...
2
votes
1answer
52 views

Add a custom header to Postfix with the relayed domain

I've got a Postfix setup that allows relays only from certain domains. I accomplish this using the relay_domains flag in main.cf and it queries mysql to find the list of allowed domains. ...
-2
votes
0answers
31 views

mail works from webmail, outlook/thunderbird/macmail can't connect to smtp

So I'm on a digitalocean vps running Centos 6.5 and the vesta control panel. I've set up an email address jburnett@jamesburnett.com and everything works (send and receive) from webmail, however, no ...
0
votes
1answer
33 views

Postfix + php translating email addresses sent to local domains to something@localhost.localdomain [on hold]

My first question here, if I don't provide sufficient info straight away, please take it easy on me with the downvotes ;-) I'm running a VPS hosted by afterburst.com with OpenVZ I installed and ...
-1
votes
1answer
38 views

How to config Postfix/Dovecot to deliver all address+anything@example.com to address@example.com

Like Gmail how to configure Postfix/Dovecot on Ubuntu to deliver all address+anything@example.com to address@example.com?
0
votes
0answers
18 views

DNS records for mail server [duplicate]

I've been toying with an old box I've got at home and decided it might be fun to set up a mail server. It's running a lightweight debian distro, postfix, and dovecot, along side a web server, PHP, ...
2
votes
2answers
26 views

Will adding an MX record for email forwarding conflict with an email provider like sendgrid

I'm planning on receiving email/forwarding email using postfix, but sending email using sendgrid. According to this tutorial, I need an MX record pointing to my machine - ...
0
votes
0answers
18 views

How to make Postfix SMTP TLS Optional?

Just did an [emergency] conversion from qmail to postfix last night - but now I'm getting people complaining that mail client errors are showing up stating "no available encryption methods available" ...
1
vote
0answers
21 views

Postfix/Dovecot multiple authentication backends

I trying to configure multiple sources on a postfix/dove server of all these: virtual_alias_maps = ldap:/etc/postfix/valiases.cf,ldap:/etc/postfix/useraliases.cf,ldap:/etc/postfix/groupaliases.cf ...
-1
votes
1answer
29 views

After server move postfix/dovecot problems

I have moved from one server provider to another porting all my domains and services. Everything went smoothly at first sight, but I realised now that i am having some problems with dovecot/postfix. ...
1
vote
1answer
56 views

IPtables drops all, but postfix still send emails

My iptables rules: # delete all current rules and user chains iptables -F iptables -X # global policy (target by default) iptables -P INPUT DROP iptables -P OUTPUT DROP iptables -P FORWARD DROP # ...
0
votes
2answers
86 views

Relay access denied (in reply to RCPT TO command) Postfix Issue

I am trying to configure my server for email taking reference form this link: SMTP Relaying Outgoing Mail in Postfix - using Webmin. I used Mandrill smtp server in my case. I have also configured a ...
-1
votes
0answers
18 views

Where to define proper domain name for postfix?

I ran into disorientation with my mailman setup, or more specificly the postfix part. I get confirmation mails when creating lists. But when I write e-mails to lists, I receive: Host or domain name ...
1
vote
1answer
21 views

Configuring postfix for forwarding rejected emails

Postfix has the rule smtpd_client_restrictions called reject_unknown_reverse_client_hostname. It has good ability to reject spam. But some times there are IP address which don't have reverse zone and ...
0
votes
4answers
5k views

Postfix: warning: connect to 127.0.0.1:10023: Connection refused, not receiving mail from outside domains

I've had a Postfix server running for a very short amount of time, and it worked, but I had to restart the server today, and I'm no longer receiving e-mails from external sources: Jan 23 01:34:44 ...
0
votes
1answer
38 views

Some mail providers reject my mails

I recently moved to a new server and now one of my users complain about e-mails which don't reach the recipient. The mail logs tell me that they reject the mail AOL will not accept delivery of this ...
2
votes
1answer
43 views

Does postfix cache RBL queries?

This is driving me nuts… Linux Debian + postfix… /etc/postfix/main.cf has the following lines: smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/access, ...
-1
votes
0answers
27 views

Apple Mail app causes SSL_accept error on postfix

I have set up an email server using dovecot+postfix and it's all working fine except for the outgoing mail sent by the OSX Mail app. In that case I get the following error: postfix/smtpd[16488]: ...
-1
votes
0answers
37 views

Postfix RBL lookup fails to trap all connections for a listed IP address

Our mail server is getting large amounts of spam from net blocks assigned to Enzu Inc. We're running Postfix 2.6.6, configured to check spamhaus and barracuda RBLs. Here is the relevant part of my ...
10
votes
3answers
161 views

Email from our server tagged as junk by Hotmail Smartscreen unable to inform Hotmail that it is legitimate

Since more than 1 month ago we are having our email from one of our servers systematically tagged as junk by Hotmail Smartscreen filter. We have taken the following actions/measures without success: ...
0
votes
1answer
209 views

How can I configure a mail server to support wildcard addresses and catch them with a server script?

Hello I'd like to know if it's possible to configure a mail server to support wildcard addresses like %@example.com or *@example.com and send those incoming emails not in a mailbox (cause they would ...
1
vote
1answer
345 views

Dual delivery Google Apps and Postifx (server reject mail from my domain on google)

This is the scenario: I have a server with Postfix and some domains, and now, one of this domains want to use Gmail Google Apps only in a couple of accounts. The end-user configure the domain with ...
-1
votes
0answers
25 views

pflogsumm report shows a lot of deferred emails

Last two days I saw a similar pflogsumm report to this one: 54118 received 44212 delivered 2 forwarded 20029 deferred (124580 deferrals) 41004 bounced 104 rejected (0%) 0 reject ...
-4
votes
2answers
54 views

Stop all websites from sending emails

I have Ubuntu Server set up on a machine. I have Virtualmin installed to manage my websites. The idea is that 2-3 of them use open source platforms like Wordpress and I didn't had time to update ...
1
vote
1answer
232 views

Postfix: Duplicate addresses in alias_maps, does the order matter?

We have a Postfix server. There are multiple alias databases, as defined in the alias_maps parameter: alias_maps = hash:/etc/mail/aliases,hash:/data/mail/aliases,hash:/usr/local/mailman/data/aliases, ...
0
votes
1answer
856 views

Postfix enable sending to any domain in the Internet with authentication but no SSL

When I try to send a mail by SMTP and Postfix I got a error "5.7.1 unable to relay". After lot of config changing it worked for me to send email to the same domain as server (to other accounts on ...