0
votes
0answers
9 views

force upstream smtp outbound through proxy

Upon inspection of emails sent outbound to external domains, the backend is revealed as being the true sender, rather than the proxy itself. When sending within the domain, from local user to another, ...
0
votes
1answer
18 views

List of DNS Queries when webclient tries to connect to a smtp server [closed]

I am trying to understand the DNS queries which are being used by smtp servers and mail client. I am not sure about the webclient queries. Please correct me : SmtpServer trying to connect to another ...
1
vote
0answers
62 views

Permission denied in Postfix's smtp authentication

I am trying to install a SMTP server on my personal machine (ubuntu server). I've been reading up on a lot of documentation and decided to try my hand at Postfix using sasldb2 for authentication. The ...
1
vote
1answer
34 views

How can I disable sending mail through postfix smtp with out auth

I just setup a mail server with postfix 2.6.6 and dovecot. I have the auth related config in main.cf like below: smtpd_tls_cert_file=/etc/httpd/ssl/mail.crt ...
1
vote
2answers
50 views

If I use postfix for mail relay, so is myhostname / mydestination important?

I use postfix to relay mail to 3rd party SMTP and never sent out email directly, and of course I never receive email. So If I set myhostname / mydestination to sth like fake.mydomain.com, which ...
-1
votes
0answers
26 views

SMTP Postfix server probably used as a spam relay : how to protect? [duplicate]

I'm using my own mail server to send and receive emails : a Debian 6.0.7 running Postfix 2.7.1 and Courier. Today, I'm suspecting that this server is used as a SMTP relay for spammers... The clues are ...
1
vote
1answer
61 views

SMTPD restrictions

i'm looking for a bit of advice on Postfix restrictions configuration. I'm looking for a balanced configuration which properly rejects spam and unauthorized access retries. Lately, i've been reading ...
1
vote
1answer
33 views

Postfix does not reject wrong client and HELO name

I have a postfix server configured with reject_unknown_client_hostname and reject_unknown_helo_hostname. Regardless the server accepts non sasl_authenticated connections from clients and HELO names ...
0
votes
1answer
47 views

change ehlo name of Amavis

Server: Ubuntu 12.04 64 bit Setup Postfix + Dovecot + Amavis with Mysql for Virtual domains. I have configured the postfix mailserver successfully. However when I test the Email with mail-tester.com, ...
0
votes
2answers
54 views

How to stop or prevent Postfix / smtpd / Sasl brute forcing

There are numerous attempts to connect to my mail server in order to send mail either unauthenticated or to guess username and password to, I suppose, accomplish the same. Should I fight against ...
1
vote
1answer
185 views

Postfix - Host or domain not found

I 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 : ...
2
votes
1answer
45 views

Unable to Connect to SMTP Host

I am trying to configure Postfix on CentOS 6 server, and the problem is that I cannot receive mails. I tested it on http://mxtoolbox.com/ and I get an error Unable to Connect to SMTP Host. I check ...
0
votes
1answer
42 views

Postfix mail from outside not received

I am using Dovecot with Postfix and virtual user/mailboxes. Everything works fine accepting receiving mail from outside (other domains named as the mailserver) I am able to: - send mail from my mail ...
0
votes
1answer
84 views

CentOS postfix smtp server connection refused from outside

I am quite stuck with my postfix/smtp configuration on my CentOS machine. I setup a mail dns mail.domain.tld, configured in the postfix main.conf file and tested locally on the server by connecting ...
0
votes
1answer
27 views

Postfix only delivering mail locally (instead of correct destination)

For whatever reason, postfix cannot send email to my google apps account. It says the message is sent, but I've confirmed with google apps support that the message isn't being received. (Thus it is ...
0
votes
0answers
54 views

Postfix Unable to send mail from thunderbird or outlook

OS: CentOS 6.4 64 bit Mail server: Postfix + Dovecot + MySQL + postfixadmin + Clam + Amavis I have installed a postfixmail server with dovecot,postfixadmin and mysql(virtual domains). I can send and ...
0
votes
1answer
53 views

postfix deliveries per connection

hope you can assist me in this case. I am administrating an Postfix server which is used for newsletters. Recently one of the major recipient domains changed their policies to only accept one email ...
0
votes
0answers
36 views

[Postfix/Dovecot]Impossible to send a message (smtpd)

I've just installed and configured a Postfix server with dovecot for IMAP. I've followed this tutorial for the install : http://goo.gl/Ryf49l And I've tried to connect to the server with Evolution. I ...
0
votes
0answers
22 views

Using mime_header_checks to ACCEPT instead of REJECT?

I'm pretty well versed in using header_checks/mime_header_checks to refuse smtp mail in Postfix, but now I think I've gone off the path of righteousness; I'm trying to suss out a way that I can refuse ...
0
votes
1answer
57 views

5.7.1 relay access denied when accessing from vb.net application

I am developing a program in vb.net which needs to connect directly with my mailserver (postfix) to send emails which will be directed towards email to sms transmissions. My mailserver is otherwise ...
0
votes
1answer
33 views

Allow spoofing on postfix server

I'm trying to set up help desk software which requires the ability to change the headers of a message (aka 'spoof' it). Right now, my mail server is configured to use SASL and requires authentication ...
1
vote
2answers
110 views

Postfix, TLS and StartSSL certificates

I recently changed my postfix installation to use TLS with a certificate issued by StartSSL. I then ran SMTP and TLS checks with no errors or warnings. Everything seemed to work fine. My problem now ...
0
votes
1answer
126 views

Postfix smtpd not listening 'Unable to Connect to SMTP Host'

I set a postfix + cyrus-sasl + cyrus-imapd mail server on my CentOS 6.5 x64 server. After I finished the settings, I found that I can send internal emails and send emails to other mailboxes like ...
1
vote
1answer
106 views

Postfix SMTP authentication per domain

Is it possible to configure SMTP authentication on Postfix with different user/pass credentials for different domains? So, I have a MTA that relays emails from ~20 different domains. When sending ...
0
votes
1answer
105 views

Capture virtual vagrant server smtp on my actual computer

I'm running a number of virtual servers using vagrant on my computer. This is working well. I have installed Postfix to send SMTP inside these virtual servers. But what I want to do is have Postfix ...
0
votes
1answer
62 views

Postfix: can't send mail from remote client

I'm having issues sending mail from postfix. I believe my conf. is very standard, at the end it was put together from various guides. I'm trying to send mail from remote client (iOS Mail, and Mac OS X ...
0
votes
1answer
62 views

Postfix relay mails from a single domain and IP

we have an Mdaemon server which redirects outbound mails to an external basic Postfix relayer. We have configured firewall rules (in front of postfix server) to accept smtp requests only from the ...
3
votes
1answer
199 views

Postfix client host rejected

I set up Postfix+Courier+Roundcube on Ubuntu 12.04, but when I try to send an email with Roundcube, I receive the following error: /var/log/mail.log : Dec 30 20:54:35 server postfix/smtpd[31465]: ...
0
votes
1answer
613 views

Postfix (delivery temporarily suspended: conversation with mydomain.net [private/lmtp] timed out while receiving the initial server greeting)

I'm running Debian 7.1, Postfix version 2.9.6, Dovecot Version 2.1.7 To set it up I followed mostly this (without the spamass-clamav-greylist bit) I have also got setup smart host relaying via gmail ...
1
vote
2answers
68 views

Postfix smtp for sending only

The web hosting provider of my company have a mail server with a sending limit of 300 mails a month so the idea is keep using the hosting mail for the mail spool but set up a local Debian server with ...
0
votes
1answer
43 views

How to override an MX value for a particular domain using a transport_maps but have some form of redundancy

I have a postfix mail server and I want to override an MX value for a particular domain. From my understanding this is can be done by the use of transport_maps ...
2
votes
2answers
61 views

Postfix doesn't require authentication for local emails?

I've got a Postfix/Courier mail server (Authenticated with SASL/MySQL) all according to this tutorial. I'm currently running my server on Debian 6, it is a VPS. It works well as far as I can see but I ...
1
vote
2answers
122 views

HAproxy for postfix

I want to setup HA postfix mail servers with 2 postfix instances. I have two postfix servers and I configured two postfix instances on these servers. Now I want to know how to configure HAproxy ...
0
votes
0answers
46 views

Postfix forward unknown email address to another server

I have a postfix setup with multiple domains, which is managing mailing lists for several domains. Previously, all of these domains actual email addresses have just been aliases to other email ...
2
votes
2answers
50 views

Move Maildir safely on running server

I want to move some Mailbox directories to a new disk while postfix and courier imap daemons are still running. The question is ¿what happens if a new mail is recieved into the Mailbox while moving ...
5
votes
1answer
187 views

saslauthd multi instance for postfix smtp authentication

I have mail server Postfix+Saslauth. I configure multiple instance for Postfix: postfix postfix-out and two instances for saslauth: saslauthd saslauthd-out Setting saslauthd is ...
0
votes
1answer
151 views

Postfix and saslauthd on Debian Wheezy not working after upgrade

Since upgrading to Wheezy I've been unable to send emails via my own mail server which used to have a functioning combination of Dovecot, saslauthd and postfix using pam. Now, running testsaslauthd ...
0
votes
0answers
20 views

centos rely access denied postfix send mail [duplicate]

I am trying to send mail from my centos using postfix configuration but getting error as 554 5.7.1 <dummy@gmail.com>: Relay access denied my postconf -n shows belog information ...
0
votes
1answer
52 views

Postfix: Possible to overwrite Return-Path via SMTP

I tried sending mails via SMTP and provied a Return-Path. Postfix seems to override my values with the "From"-Header. When im sending Mails via PHP, I am able to set the Return-Path Header with the ...
0
votes
1answer
355 views

554 5.7.1 <mail_addr>: Relay access denied centos postfix

I have problem in send mail from postfix in centos I have following setup mail server postfix for sending mail but I am getting error. As in the link I tried following commands telnet localhost ...
0
votes
2answers
342 views

Postfix not sending/allowing receiving of messages after server (hardware) changed

We had na old notebook runing Ubuntu 12.04 working as a web/ftp/mail server and it worked but since the notebook was a notebook and pretty old and unreliable, a desktop was bought to replace it before ...
0
votes
1answer
111 views

Postfix: mail going to spam [duplicate]

All emails I send from my new server go to spam in Gmail (and sometimes yahoo). I've never before sent out mass email or spam. What I've already done: Configured reverse DNS Enabled DKIM Verified ...
2
votes
2answers
61 views

How to get feedback from SMTP server, connecting to it from another server in the same network?

I have the following scenario: [HTTP Server]: process messages [SMTP Server]: only send messages [HTTP Server] === connect to ===>>> [SMTP Server] === sends message ===>>> [world] Ok, this is ...
0
votes
0answers
60 views

can't send with postfix but I can whith one user

I have a postfix and dovecot server but when i try to send an email i get an time -out. Im trying to send with the email pinda@treadity.com. A telnet session isn't helping much ether. I get a blank ...
1
vote
1answer
291 views

Can't connect to smtp (postfix, dovecot) after making a change and trying to change it back

I am using postfix and dovecot along with zpanel and I tried enabling SSL and then turned it off as I did not have SSL configured yet and I realized it was a bit stupid at the time. I am using CentOS ...
1
vote
0answers
53 views

Configure postfix to limit total number of connections from any and all SMTP clients in a given time period?

I am trying to figure how to configure Postfix to operate within the requirements given by Spamhaus for free usage of their DNSBLs (http://www.spamhaus.org/organization/dnsblusage/). They specify that ...
0
votes
0answers
31 views

Postfix dosen't forward to Gmail Yahoo Hotmail

I have a problem with my Postfix 2.8.4 (Cent OS 6 with Plesk 11.0) If i sent an email to one of these providers, it will be delivered ok. If I setup my email to forward all emails to one of these ...
0
votes
1answer
36 views

Postfix maillog: warning: host nb-mx-vip1.prodigy.net[207 .115.36.20]:25 greeted me with my own hostname

Mail server on internal system, reachable through a gateway / firewall via forwarded port returned this error. I upgraded my environment (unadvisedly) with Fedora Core 19 and have had lots of ...
0
votes
0answers
62 views

Postfix Dovecot receive, no send

I've recently set up an email server using postfix and dovecot. On my android phone I can get incoming emails, but I can't use outgoing emails. When I attempt to set up "Can't safely connect to ...
-1
votes
1answer
291 views

Spam Filters - Why does the same message fail via one smtp server but not the other?

I have a PHPMailer script sending email. If sent via postfix localhost it is marked as spam with these headers. Delivered-To: xxxx Received: by 10.58.210.166 with SMTP id mv6csp82473vec; Sun, ...