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
0answers
14 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, ...
1
vote
2answers
17 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 - ...
1
vote
0answers
13 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" ...
0
votes
0answers
13 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
vote
1answer
40 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
1answer
22 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. ...
0
votes
0answers
16 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 ...
0
votes
1answer
18 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
2answers
53 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
vote
0answers
19 views

mail command always pointing to root's file

I am trying to configure a postfix mail server. Mails for the root are accessible. But while checking the mail for non root users, I get the following error /var/spool/mail/root: Permission ...
0
votes
1answer
32 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
35 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
23 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]: ...
0
votes
0answers
31 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 ...
-1
votes
0answers
20 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 ...
3
votes
1answer
69 views

Escape dollar sign in postfix config file

I have a password for an SMTP relay server with a dollar sign in it. How to enter this into main.cf without postfix thinking it's a variable? I see nothing here about escaping dollar signs. I ...
-7
votes
0answers
30 views

Log To and From headers of all email sent in postfix [closed]

We have a postfix based mail server, used by 3 users. For monitoring purposes I want to collect the "To" and "From" addresses of all mail sent through the server. I tried syslog but it is not working ...
-1
votes
0answers
29 views

Configure postfix to accept SMTP connections from Gmail and relay email “Sent as”

I'm trying to configure postfix on Ubuntu 14.04 LTS to let SMTP clients connect to it via TLS over port 587, in order to enable the "Send mail as" feature in Gmail. The problem is that no matter what ...
2
votes
1answer
18 views

Spamassassin filter based on destination domain

I am trying to configure my SpamAssassin (running in combo with amavisd) in order to lower the spam score limit assigned to emails directed to a specific domain (lower required_score only for incoming ...
-3
votes
1answer
27 views

postfix From address rewriting

I have postfix version 2.7 running with multi-domain MySQL support. I have created distribution/Aliases for support@example.com which distribute email to user1, user2... etc.. my requirement is when ...
0
votes
2answers
63 views

Centos 6 - Postfix wont send to own domain without flag

I am moving a site to another server and am having an issue with PHP mail. But only when sending mail to the host domain e.g anything@example.com. mail($send_to, 'Web contact' ,$message,null,"-r ...
0
votes
1answer
24 views

Delay in delivering messages with Mailscanner and Postfix

With Mailscanner (v4.85.2) and Postfix (v2.11.1-1) on Ubuntu mail is being delivered, but there are times where messages sit on the incoming queue after mailscanner has scanned them for right at 5 ...
-2
votes
3answers
31 views

How to force Postfix SMTP to use AUTH (SASL?) and reject anonymous connections? [closed]

The following snippet has been added to the main.cf file of postfix: smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd ...
-4
votes
2answers
53 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
27 views

SMTP service detection

I have some basic questions regarding SMTP connections, particularly for Postfix but would appreciate advice for MS Exchange too: When a single relay for a given remote domain becomes unavailable, ...
-1
votes
0answers
43 views

How does Postfix work in a cloud environment?

I'm trying to figure out how should one configure a Postfix in a cloud environment! Consider the following diagram: My understanding of a cloud environment is that one should be able to easily ...
1
vote
0answers
19 views

Spamassassin (possible) 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 ...
0
votes
1answer
38 views

Self signed certificate in certificate chain

I'm having building the correct certificate chain. My certificate issue a class 2 issued by StartSSL. Here's in order what I have put in my ssl.crt: my cert https://www.startssl.com/certs/ca.pem ...
1
vote
2answers
60 views

Is it possible to shard postfix virtual mailboxes database?

I've managed to configure Postfix to read virtual mailboxes list out of a database. But what if my list is distributed among multi databases? Is there any way to set Postfix's database access ...
-1
votes
2answers
25 views

Change Mail Password, leave user system password

I have a Debian Jessie server that provides (web-)mail using postfix, dovecot and roundcube. To log-in to roundcube webmail, I have to use my system user name and password. This seems like a major ...
0
votes
0answers
9 views

Zimbra mail server - Temporary lookup error only via mail client (not webmail) [duplicate]

I've configured a Zimbra server with Ubuntu (zmcontrol -v ~ Release 8.5.1.GA.3056.UBUNTU14.64 UBUNTU14_FOSS edition.) and I can send e-mail via webmail just fine (both to an address inside the domain ...
0
votes
0answers
18 views

Server apparently being exploited to send emails [duplicate]

I have a dedicated server which runs a forum, a couple of wordpress installations and a prestashop ecommerce platform. My datacentre keeps cutting my connection, stating that my server is sending out ...
0
votes
0answers
16 views

Postfix: rewrite “From” header and Sender Envelope with SASL username [duplicate]

I set up an authenticated mail server, in which a user needs an account to send mail. The SMTP username is the sender's email. The problem is that any authenticated user can send email with any from ...
1
vote
0answers
8 views

How to pass full user name to saslauthd from postfix [duplicate]

I'm trying to configure postfix for SMTP Auth using Cyrus saslauthd and an rimap configuration. I have it working, except for the fact that, due to virtual domains, the auth username for my IMAP ...
1
vote
1answer
23 views

Postfix forward specific mails from HOLD queue

Is it possible in postfix to forward messages from the hold queue by referencing to them by their file name? The best way would be by a terminal command. Even better would be a python command. If ...
1
vote
2answers
42 views

How to pipe postfix into Codeigniter controller

I currently have postfix piping into a PHP script to process the email via an alias. catchall: |/var/www/vhosts/website/httpdocs/scripts/incoming_mail.php However, I wish to use the DB config etc ...
0
votes
0answers
27 views

Can use webmail but cannot send via javax [migrated]

I currently have a mail server up and running. I can log into my web-mail client via mywebsite.com/roundcube/ Web-mail allows me to send and receive email appropriately. Logs show all the mail come ...
1
vote
1answer
27 views

How do I move a Maildir to a subdirectory of another user?

When an employee has left the company I want to move their entire Maildir to be a folder in an "old employees" account. Given that Maildir uses the filesystem exclusively, I feel it should be ...
0
votes
1answer
20 views

SpamAssassin discards messages but it should not

On my email server I have configured SpamAssassin to do a header-rewrite and add "[SPAM]" to the subject of messages if they are identified as spam. The /etc/spamassassin/local.cfis: rewrite_header ...
0
votes
2answers
54 views

PostFix 550 5.1.1 Recipient not found from external email

This is a new installation. PostFix reports "550 5.1.1" "Recipient not found.", when users exist. User can send email out everywhere. Users can send email to each other through localhost. All ...
2
votes
1answer
32 views

Postfix, ruled based filtering independently for each user

I managed to create successfully a white-list sender email filter see: here. My goal now is to have separate filter for each user. I would like to filter out all the emails based on the rules created ...
3
votes
1answer
26 views

Does inet_interfaces bind outgoing mail when more than one address is specified?

Question: When specifying 2 or more address for the inet_interfaces directive, will postfix still bind outgoing mail to one of them? The postfix docs state: When inet_interfaces specifies just ...
3
votes
3answers
67 views

Reject incoming emails that use your own domain as sender

It would be nice to reject incoming emails which use one of my virtual domains as sender address while not being a legitimate user of mine. I know that I can reject incoming emails which use an ...
-3
votes
1answer
16 views

make postfix bypass amavis completely for specific domains

I want the postfix agent to bybass the amavis scanner for all mails from and to a specific domain. So, i added the following line to /etc/postfix/main.cf header_checks = ...
3
votes
1answer
106 views

postfix: forward all mail except local user ones

I have a website on a server with a postfix mail server to send the site's emails. Let's say the domain is example.com. The site can send mails to mailboxes of his own domain (like ...
0
votes
1answer
30 views

IMAP authentication with Courier throws error

I've just set-up PostFix + Courier + Roundcube using the following site for my instrcutions: http://flurdy.com/docs/postfix/ I was attempting to log into my webmail and it failed. Checking the logs ...
0
votes
0answers
30 views

postfix bounce email to seperate dovecot server [duplicate]

I have searched for information about installing dovecot on a different server than the one that postfix is running. My setup is multiple postfix servers running in docker containers. I like to ...
2
votes
1answer
51 views

Postfix : Conditional Header Checks

Here is my SMTP situation. Mail flow is tagged by an online relay provider (!!SPAM!!, !!BULK!!, etc) Mail flow is received by an internal postfix. Transport is configured to relay to our internal ...
2
votes
1answer
48 views

Minimal Postfix master.cf

I'm currently deploying yet another Postfix MTA and this time I'd like to thin down the master.cf and disable unneeded services to reduce the potential attack surface, and get a better understanding ...
1
vote
1answer
106 views

VPN for static e-mail delivery IP? [closed]

As we all know, e-mail from a server with a dynamic IP-Adress is (nearly) always rejected because of the high risk of spam. Now I had the following idea and wanted to ask you if this'll work. Let ...