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2
votes
2answers
31 views

Where do these “single-dot” smtp connection failures come from?

I'm running a mailserver based on postfix. There are a lot of connection failures like this: Transcript of session follows. Out: 220 hostname.tld ESMTP Postfix In: . Out: 502 5.5.2 Error: command ...
1
vote
1answer
41 views

Postfix: Set custom SMTP Banner based on address used to access server

The Postfix parameter smtpd_banner sets the text of a server's SMTP greeting banner. The default setting is: smtpd_banner = $myhostname ESMTP $mail_name My mail server has several unique IP ...
-1
votes
1answer
89 views

What's the difference between postfix/smtp and postfix/smtpd

A bit confused when reading through the logs of my smtp/mail server, I'm turning this questions to you guys. In the maillog files I'm seeing entries for postfix/smtp as well as postfix/smtpd. I can ...
0
votes
1answer
70 views

Why am I getting a 'fatal: SASL library initialization'

If I turn on smtp_sasl_auth_enable=yes <- yes I get this set of warnings and a fatal for SASL. I can not see why it's also looking for cyrus - which is not compiled in. postfix/smtp[87056]: ...
-2
votes
1answer
117 views

Issues sending and receiving mail, Dovecot, Postfix etc

I have been trying to fix my mail server for 3 days now. I'm not really new to Debian and Apache and such but I am new to Dovecot and Postfix. At this point I have set up the virtual users and the ...
0
votes
0answers
13 views

How to remove an entire Qmail queue? [duplicate]

I have a Qmail MTA queue with 100k messages in the queue. How can I remove the entire queue? I need to regain control of my machine, I will investigate the compromised php scripts afterwards. The ...
-1
votes
1answer
69 views

Understanding Postfix Mail Log (Part II)

There are several logs like below in my Postfix mail log: Mar 9 06:01:10 postfix/smtpd[23043]: initializing the server-side TLS engine Mar 9 06:01:10 postfix/smtpd[23043]: connect from ...
2
votes
1answer
473 views

Limit concurrent connections to Postfix server

I'm having trouble limiting the number of concurrent connections from the same client to my Postfix server. Limiting the maximal number of concurrent processes, from the same or different clients, is ...
1
vote
1answer
53 views

How to scan mails with amavis from other mailserver

I have two postfix mail servers mailserver1 is running amavis to scan spam and virus mails mailserver2 is running without amavis. My question is how is the smartest way to use mailserver1 ...
2
votes
1answer
5k views

550 Recipient address rejected: User unknown (in reply to RCPT TO command) - for an external domain

In postfix, I'm unable to receive mails from the specific domain but I'm able to send mails to it. For some reason postfix thinks the domain is internal, correct me if I'm wrong? Sample from postfix ...
1
vote
1answer
487 views

Postfix refuses to send mail to some recipients

I got a third-party application running on localhost trying to send mails with postfix via smtp on the same machine. The problem is that postfix seems to refuse mails to some recipients: Content of ...
0
votes
1answer
50 views

Postfix accepts unauthorized requests

Here is an excerpt of my Postfix configuration: broken_sasl_auth_clients = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_sasl_auth_enable = yes smtpd_relay_restrictions = ...
0
votes
2answers
76 views

Receiving mail in a python process on an aws instance

I'm using a Python smptd server on an AWS instance. It's listening on localhost, port 25. I can send mail to it through a Python smtp client on the same instance. I have an elastic IP associated with ...
2
votes
3answers
45 views

use two different configs in one postfix, is it possible?

I'm wondering if is it possible to specify another main.cf for the configuration of smptd service in another port paired with normal config in standard port. I know that is it possible to override ...
0
votes
1answer
344 views

Incoming hotmail connections timing out with TLS enabled

Okay, this has me completely baffled. I have tried many things to fix this but I'm at my wits end. At the start of June, the server which I maintain suddenly decided to stop accepting incoming TLS ...
1
vote
6answers
1k views

SMTP server takes 30+ seconds to accept a message, how to make it faster?

One of our SMTP servers is slow accepting emails, here is the typical output (response time 30+ seconds) from a smtp client script: 2014-02-26 11:44:11 +0800 BEGIN 2014-02-26 11:44:11 +0800 LOGGED IN ...
1
vote
2answers
834 views

Postfix noqueue reject

I have own a vServer and multiple domains. The server is mainly used for Websites but I've also set up postfix and dovecot to deliver mail. Everything is working as expected. Even for different ...
0
votes
1answer
1k views

postfix welcome message smtpd_banner

I would like to greet the remote client showing his IP. For example: "mysite.com ESMTP Hello xxx.xxx.xxx.xxx your actions will be logged" I have this... smtpd_banner = $myhostname ESMTP ...
3
votes
1answer
111 views

Avoiding non-existent domain point to my country's Network Information Center?

I have received an alerting email about the Mailqueue length from the Nagios: Additional Info: WARN - Mailqueue length is 18 (More than threshold: 10) In the mailq, I see some messages like this: ...
1
vote
2answers
1k views

What is the exact meaning of “SASL authentication failure: incorrect digest response”

I followed Flurdy's how-to for setting up a mail server on ubuntu. I can receive mails and use squirrelmail to read and send emails. However, I can't send emails through my server using my email ...
4
votes
1answer
1k views

Can I use DenyHosts for a SMTP service

I would like to block some hosts that are brute forcing my SMTP server. I'm currently using DenyHosts for SSHD and was wondering if I can add the SMTP service too. It could be possible based on this ...
2
votes
4answers
4k views

Receive emails on Amazon EC2 Server

I just got started with an EC2 instance and got my mail sending limit removed, allowing me to send emails from my instance. But due to lack of experience, I have no clue on how to enable receiving ...
1
vote
2answers
614 views

postfix rejects incoming mail / 450 error / hostname returns different ip

I'm trying to find why postfix rejected the incoming mail the line from mail.log is: NOQUEUE: reject: RCPT from unknown[xxx.xxx.xxx.1]: 450 4.7.1 Client host rejected: cannot find your hostname, ...
1
vote
1answer
430 views

Postfix mail size counting

If I'm right Postfix counts mail size with an attachment sent to multiple receivers as one big e-mail. Eg.: User sends mail with 8 MB attachment to two receivers. Postfix thinks it's 2 x 8 MB = 16 MB ...
2
votes
2answers
126 views

Postfix rejects mails if policyd is not reachable

I got a postfwd daemon running and it does a great job. smtpd_recipient_restrictions = [...] check_policy_service inet:192.168.10.7:10040 But if this server (192.168.10.7) isn't ...
1
vote
1answer
912 views

smtp authentication on postfix mail server with slackware linux 13.1

I am failing to authenticate to the mysql mail database using saslauthd (cyrus-sasl2.1.23) thru pam-mysql. Below are some of the commands execute as well as the configurations root@xxxx:/# ps aux | ...
0
votes
1answer
2k views

Postfix/SMTPD Relay Access Denied when sending outside the network

I asked a very similar question some 4 or 5 months ago, but haven't tracked down a suitable answer. I decided to post a new question so that I can ... a) Post updated info b) post my most current ...
1
vote
2answers
353 views

Lean & mean, basic SMTP server, for use over a single domain, no fwd'ing

Looking for recommendation for a light-weight, SMTP server, with basic capabilities (will be run on port#25, with authentication but clear-channel), and it's use shall be limited to a particular (or a ...
0
votes
1answer
1k views

postfix: smtpd configured to allow mail to/from local domain only?

I have an email server set up for our company's domain. We want to be able to receive our domain-based mail but we would like to be able to send email to ANY domain through the server as well. Using ...
1
vote
1answer
181 views

Postfix advanced relaying config/control

How do I make Postfix only accept outbound mail from $mynetworks if the from is *@mydomain(s) ? To be clear (and differentiate from similar questions I found) I want to make postfix such that users ...
0
votes
2answers
271 views

Godaddy virtual dedicated server smtpd load

I am having a problem with the average server load on my godaddy VDS getting as high as 50. The culprit is all the smtpd processes. If I kill postfix the server load will drop down to about 0.7. ...
2
votes
1answer
4k views

unable to open Berkeley db /etc/sasldb2: No such file or directory

In /var/log/mail.log I get such error message: Jul 25 01:33:11 ubuntu8 postfix/smtpd[10863]: warning: SASL authentication problem: unable to open Berkeley db /etc/sasldb2: No such file or directory ...