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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-1
votes
0answers
16 views

Linux Server Sending Spam, Linux Malware Detect / ClamAV can't find the malware [duplicate]

I am using Linux Malware Detect and ClamAV in order to find spam malware on my linux server (Debian Squeeze). It doesn't seem to find what is sending it, as me and other users keep received rebound E-...
-3
votes
1answer
21 views

SMTP port listening but unable to connect

I used this tutorial to setup a server on Ubuntu using Postfix and Dovecot. Everythings looks like it should be working tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN ...
-1
votes
1answer
17 views

Does using an smtp relay help preventing your email going into spam? [duplicate]

Does using an smtp relay such as google's smtp-relay.gmail.com prevent (or at least help) your emails not going into the spam folder on the recipient?
0
votes
0answers
11 views

How to make Postfix null client save a copy of sent email to Office 365 sent items folder

We've got bit of software that is sending email by smtp which unfortunately isn't configured to save a copy of the sent mail to any folder. The client is on Office 365 and there's no way at present ...
0
votes
0answers
15 views

How to make Postfix Receive Email for 2 IPs/Domains on one server?

I have a dedicated server. I've added a second IP in /etc/network/interfaces. Both domains are working. And both send emails correctly, displaying their respective domain names. My problem is that ...
0
votes
0answers
13 views

fail2ban saslauth ban not working

when I run: fail2ban-regex /var/log/mail.warn /etc/fail2ban/filter.d/sasl.conf output: Date template hits: 8158 hit(s): MONTH Day Hour:Minute:Second 0 hit(s): WEEKDAY MONTH Day Hour:Minute:Second ...
1
vote
1answer
11 views

Configuring postfix to use smarthost

I have an application running on centOS 7, which needs to be configured to send mail(postfix) to a third party SMTP server. I have found that a way to accomplish this is to configure a smarthost using ...
-1
votes
0answers
21 views

Installing a mail server suporting multiple domains on linux using postfix + dovecot [on hold]

I am trying to create a mail server on linux (ubuntu). I have seen some tutorial but most of them does not work, or they "partly" work. I've been trying to use postfix with dovecot. Basically what i ...
0
votes
1answer
18 views

Postfix 2.11.3 Mail gateway: Recipient address rejected: User unknown in local recipient table

I am trying to recreate a mail-gateway for spam/antivirus-checks on a new debian system (Postfix 2.11.3) coming from an older OpenSuse Installation (Postfix 2.6.5). I tried to test it with "telnet ...
1
vote
1answer
19 views

Postfix - how to prove the error 450 4.7.1 <domain.com>: Helo command rejected: Host not found;

a customer is trying to send me a email but gives in my postfix log: NOQUEUE: reject: EHLO from mail.domain.pt[xxx.xxx.xxx.xxx]: 450 4.7.1 <otherdomain.pt>: Helo command rejected: Host not ...
0
votes
1answer
21 views

Why does SPF_Not_Pass reject on “neutral” result?

I have troubles understanding the default HELO checking policy of policyd-spf. RFC 4408 states in section 2.5.2, that A "Neutral" result MUST be treated exactly like the "None" result But the ...
0
votes
0answers
14 views

Gitlab won't send emails

I have Postfix installed on my server and I'm able to send emails via the CLI using Gmail's SMTP servers. The problem is whenever I try to send an email from the Gitlab website installed on my server, ...
0
votes
1answer
28 views

postfix suddenly failed to expand mail aliases

I have used postfix on vine-linux legacy machine names "vine.domain.com (@ 210.251.xx.xx/28)" and have set mailalias on /etc/aliases: mike: xxx_xxxxx@gmail.com for a long time. I have put $...
0
votes
0answers
21 views

Postfix rewrite header based on sender and receiver

I have a Postfix and Mailman setup working properly. Now, I would like to configure my system so that every time someone sends an email to requests@domain.org it gets forwarded to the mailing list ...
1
vote
1answer
14 views

Postfix/Amavis 451 4.3.0 : Temporary lookup failure

I am trying to set up a postfix server to prevent spam/malware. The server should reject incoming mail, that is suspicious, otherwise send it on to the actual mailservers which are listed in ...
0
votes
2answers
44 views

How to identify spamming script

I know this is an age-old question but I've not found a satisfactory answer on how to identify a spamming script on postfix. I know I've to look at the mail logs for postfix, get the message ID and ...
2
votes
0answers
25 views

System reboot results in T_DKIM_INVALID spamassassin

I have installed and configured OpenDKIM in my Ubuntu 16.04 digitalocean vps and enabled the DKIM Plugin in SpamAssassin with loadplugin Mail::SpamAssassin::Plugin::DKIM in one of the .pre files ...
1
vote
1answer
22 views

OpenSSL No Client Certificate Presented (SMTP, Postfix)

I used OpenSSL to create a private key and self-signed public certificate. I then created a Certificate Authority file that contains both the private key and public certificate (mail.example.com.pem). ...
0
votes
0answers
12 views

Configure Postfx using external domain

Please tell me, if I have two servers, one does not have a domain name. Can I configure Postfix to send and receive mail at first using a domain of second? And if so, how?
1
vote
0answers
9 views

Prevent misdirected bouncebacks from forwarding server

Note: This question is a duplicate of Avoid creating backscatter on a Postfix forwarding server, for which the only answer was "sorry, nothing you can do", but I provide more detail here, consider ...
0
votes
1answer
29 views

Posfix: SASL authentication failed (unbuntu/office 365)

I'm unable to get postfix to work with our office 365 mail. here's the main.cf file: smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory = no ...
0
votes
1answer
28 views

Problems configuring Postfix to send mail using the Exchange 2013 SMTP server

First I successfully configure a working Postfix configuration to use the SendGrid SMTP to send mails. Now I modify the configuration to use the Exchange 2013 SMTP server to send mail. I have looked ...
0
votes
0answers
9 views

Postfix relay only and also forward credentials

The scenario is the remote SMTP server is slow, so I'd like to set up Postfix as a relay. What I'm trying to do is Users will simply change the server from smtp.exmaple.com to localexample.local ...
-1
votes
0answers
12 views

how to construct a postfix check for an “improper folded header field made up entirely of whitespace (char 09 hex)”

I have a MUA which seems to be capable of generating mails which get rejected by other servers' amavis with the following message: X-Amavis-Alert: BAD HEADER SECTION, Improper folded header field ...
0
votes
1answer
9 views

Mail server - Amavis with 7zip

After 1,5 year with working mail server on Ubuntu 14.04 I've experienced strange amavis logs listed below: http://pastebin.com/RwbNw78f Mail server is: Postfix + Dovecot + MySQL + Amavis + ClamAV + ...
0
votes
0answers
31 views

Postfix - relay - User unknown in virtual mailbox table

I'm trying to make new a local mailserver to our office ( we have poor connection ) with users in mysql . I have some "road warriors" that uses our isp mail server , and rest ( most of them ) are ...
1
vote
0answers
8 views

Email address tagging doesn't work with virtual mailboxes in postfix

I have my own email server, and I'd like to be able to use dynamic email address tagging. I added the recipient_delimiter = +- directive to my config and restarted postfix, but now if I email bob+...
0
votes
0answers
17 views

Postfix vs stunnel relay but outlook client can't sent

I have a problem after setup postfix vs stunnel is relay host: client outlook --->[postfix:25 relay to stunnel:1125]--->smtp.vt.com.vn:465 I can sent email via postfix with telnet command but ...
1
vote
1answer
24 views

AWS with Postfix / Dovecot - Can't access port (25,110)

Currently i have installed Postfix and Dovecot to my AWS Instance. I am able to ping and open dovecot / postfix at port (25,110) at my localhost using: telnet localhost 25 Trying 127.0.0.1... ...
0
votes
1answer
26 views

postfix user unknown in virtual alias table [duplicate]

first of all - i am still on a beginner level. As the Topic say i have problems with my mailserver (postfix 2.11.3) on Debian Jessie. It is a VPS with two domains and each has his own IP. When i ...
-1
votes
0answers
17 views

Having issues with lmtpd and cyrus in a CentOS server

So, I'm trying to get a simple cyrus server going but my mails keep getting stuck in the mailq. The proper error messages look like this: B6B48113A250 324 Sat Jul 9 17:06:49 user@server.com (...
0
votes
1answer
43 views

Postfix Virtual Domain - mail is send by second server [duplicate]

i setup postfix on a VPS with two domains (each one with own ip) domain1 - 194.xxx.xxx.1 domain2 - 194.xxx.xxx.2 when i send a mail via domain2 - i am getting dmarc reports that the mail uses the ...
0
votes
1answer
42 views

Contact form from ubuntu to Zoho email address

I would like some support in order to get my Postfix configuration working with my Zoho email account. What I am trying to do is to send a message from my contact form in http://www.g3eo.com/#!/...
0
votes
0answers
23 views

Allow incoming email for specific mailbox only from specific domais/email addresses

here running postfix 2.6.6 I have a specific local email address account that I need it to accept incoming emails only from specific domais/email addresses. All others incoming emails to this local ...
0
votes
1answer
14 views

Postfix - Mail only being received for one domain when configured to receive for several

I have postfix setup to receive mail for three domains example.net and example.com. I have this setup with aliases, with an info@ address for each domain both going to a local user, Jason. DNS is ...
1
vote
0answers
18 views

Postfix. Sending some messages using external smtp server and some messages “directly”. Issue with sender_dependent_relayhost_maps

I'm configuring a new web server and i need to make emails from my PHP scripts to be sent. Most messages should be sent using mandrill SMTP and some "directly" from my server to email services. I ...
0
votes
0answers
9 views

Postfix Ubuntu Server 14.04 Some users Local Emails Only

I have been working with postfix Email server for a while seems to be running great, I wanted to implement that some users can only send to their domain (internal emails only) but cannot send outside ...
3
votes
1answer
49 views

Why does my Postfix act as an open mail relay, and how do I stop it?

I have a mail server set up with Postifx/Dovecot/MariaDB in CentOS 7. It is somehow configured as an open relay. Do you have any idea how to stop this? Config files below: master.cf # # Postfix ...
0
votes
0answers
22 views

Postfix - Mails being received but not written to disk anywhere

I am having my first attempt at setting up virtualhosts with postfix, and have run into an error. The logs show the mail is received, but it does not seem to being written to disk anywhere. This log ...
0
votes
2answers
35 views

Redhat EL 7.2 using postfix to use smtp.gmail.com to relay not working

I am running rhel 7.2, I have postfix installed and can't get it to relay through gmail smtp servers. I have followed lots of tutorials and googled and tried answers to lots of others posts but I can'...
1
vote
1answer
21 views

Restrict relay with postfix to certain domain from single IP

In my company we're using Postfix as a relay for Google Apps SMTP server in a Debian server. Legacy machines like scanners forward messages to our relay server. How can i allow the scanner to only ...
-1
votes
0answers
26 views

No encrypted email from my Postifix Dovecot mailserver

i'm desperate because don't reach to set my postfix to send encrypted email. The answer is always the same (using checking software like www.checktls.com): Your email was sent, however it was NOT ...
1
vote
3answers
104 views

mails fom my mailserver go to spam folder of hotmail.com [duplicate]

I set up a mail server with dovecot/postfix on a debian server. I don't send commercial mail or newsletters. We are only 4 users and nobody send SPAM. We only send classical mails (no large pictures ...
0
votes
1answer
19 views

How to restrict SMTP login to its own address in sasldb2? [duplicate]

I'm using sasldb2 (without saslauthd) for SMTP authentication with Postfix. To create a new user, I run saslpasswd2 -u example.com mail which creates a login mail@example.com. However, using these ...
1
vote
2answers
78 views

Postfix limit total sent per hour

I'm not after services that could provide me with fancy fine-grained control like policyd, I don't need per user/domain control, I only want to: limit maximim number of emails that could be sent ...
0
votes
0answers
13 views

postfix body check file content

I come across a strange scenario. I'm using a file containing lines of keywords for postfix to scan so that it can reject spam messages. Now this line causes postfix to think an email containing ...
0
votes
0answers
17 views

Postfix GMAIL Relay – Issues with Mail

I’ve installed the latest release of Postfix onto a CentOS7 server and have configured it to relay any mail on test@mydomain.com to send to an account on Gmail. The problem I have is that whenever ...
0
votes
0answers
31 views

postfix mails stuck in mailqueue

I ran into a problem, I'm trying to set up postfix mail server (I'm using webmin), everything seems to work fine, I successfully connected outlook to POP3/SMTP, but as soon as I send an email, it gets ...
0
votes
0answers
24 views

Smtpd_sender_login_maps isn't working for Postfix

So I'm trying to set my postfix up so that only certain users can relay their own emails. Instead of allowing them access to all the emails on the server. At the moment with the setup below any ...
0
votes
1answer
62 views

Outgoing spam from postfix using my domains

I get a lot of spam outgoing from my server which uses fake emails but real domains (that are hosted on my server Linux Debian Squeeze). These all have "msg" plus a random number as Email address. ...