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0
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0answers
16 views

535 error from gsmtp

I am using Erlang and its esmtp library to send emails from my application. It used to work OK and still works fine on the development machine. Unfortunately several weeks ago it stopped working on ...
0
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0answers
19 views

failed/unauthorized logins attempts via SMTP/IMAP

My server host sent me this message: 80 failed/unauthorized logins attempts via SMTP/IMAP We have detected abuse from the IP address xx.xxx.xx.xx, which according to a whois lookup is on ...
1
vote
1answer
25 views

Is it possible to use CDO libraries (classic ASP) to send mail to Office 365 / Exchange Online?

I'm working on a migration to Office 365 / Exchange Online for a SMB company which until now has been running a local Exchange 2010 server; we're talking about ~25 mailboxes here. However, there's a ...
0
votes
1answer
12 views

503 AUTH command used when not advertised exim4 - Outlook

I do keep on getting this error: 503 AUTH command used when not advertised I have seen this question : exim configuration: 503 AUTH command used when not advertised The difference is that i do not ...
-1
votes
1answer
39 views

How to configure exim4 for both incoming SMTP for local delivery and relay for authenticated user

I want to use my exim4 mail server as local delivery for anonymous sender for my localdomains, and relay to everyone only for authenticated users. Is it possible?
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0answers
30 views

Postfix permit localhost use plain login

I have postfix 2.11 setup on Debian jessie with Dovecot SASL and I require encrypted login mechanism to send mail via smtp. For this purpose in the main.cf I've smtpd_tls_auth_only = yes option set. ...
1
vote
1answer
62 views

postfix/dovecot - how to view smtp auth user in log files?

I am using postfix with dovecot and virtual users on a centos 6 system. I had a rush of spam recently, with tons of packs of 50 recipients delivered from an unknown account. The current logging ...
0
votes
2answers
91 views

Dovecot doesn't create /var/spool/postfix/private/auth

I'm moving an Ubuntu 14.04 postfix mail installation from one machine to another. The current setup works fine pretty much with Ubuntu's default postfix and dovecot setup so that users can use SMTP ...
1
vote
1answer
173 views

Setup Postfix with SMTP-AUTH over SASL2 with SASLDB for users to send emails

Hello, I spent the last few days trying to setup Postfix with SASLDB to send emails from my application over SMTP on Ubuntu Server 15.04. I searched, read and tested a lot about it but I can't get it ...
2
votes
1answer
183 views

Exim not always sending AUTH LOGIN username/password

We are sending mail using exim (configured through WHM). With the same exact configuration, seemingly most of the time exim sends the correct AUTH LOGIN username and password, however sometimes it is ...
2
votes
1answer
123 views

Authenticating SMTP Proxy

I have acquired a number of mail users, and I'm wanting to transition them away from their current mail server and onto mine. I've set up perdition as a proxy which will allow me to proxy IMAP and ...
0
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2answers
35 views

Postfix multiple IPs: which to use for SMTP AUTH?

I am setting up a mail server which has separate IP addresses for sending and receiving mail. My config looks like this: # The addresses we send out on: smtp_bind_address = 185.xx.xx.101 ...
1
vote
1answer
27 views

Exchange 2003 restrict anonymous smtp access only

On exchange 2003 I want to listen for smtp on port 25 only so that * anonymous login is only allowed from certain internal IPs * authenticated login is allowed from everywhere I can't see how to do ...
6
votes
2answers
175 views

Postfix deny relay for some virtual users

I'm using Postfix as MTA and relay. Users that wish to send e-mail from a remote system authenticates and Postfix hands that to Dovecot, and this works well. But how can I limit which users can use ...
4
votes
1answer
678 views

How do I get disabling SMTP plaintext authentication to stick on OS X 10.10 Yosemite's Server.app

I've got an SMTP relay server that I recently replaced with OS X 10.10 Yosemite running Server.app. It is running as an SMTP-only relay allowing only hosts from the LAN to relay out through it. We do ...
2
votes
1answer
648 views

check header for Authenticated sender in postfix

My users send email with SMTP AUTH via SASL Authentification. Unfortunately their mails would marked as NoBounceOpenRelay by Amavis. So I set this to postfix main.cf smtpd_sasl_authenticated_header ...
2
votes
0answers
350 views

IIS 6 SMTP unable to relay messages to Exchange Online

Our company uses Office 365 and our email is hosted on Exchange online; however, we have several applications which are unable to send messages directly to Exchange Online due to various reasons ...
0
votes
3answers
1k views

Email server attack from telnet

My mail server having a problem on blocking some attacker that trying to telnet to our mailserver. but i'm not able to block it, ip will keep changing even we block by ip. seems like he is trying to ...
4
votes
1answer
2k views

Postfix Recipient address rejected: Access denied Error

Trying to use zend mail smtp to send email from my php app login authenticated and give me this constant error I don't have to deal with I look into de 36 question here on serverfault.com changing ...
5
votes
1answer
104 views

Is Exchange 2010 compliant with RFC 3848

I have looked up Exchange 2010 Support for RFC Standards but do not see RFC 3848 amongst the supported standards. I do see RFC 4954 listed, which 'recommends use of RFC 3848 transmission types', ...
0
votes
1answer
102 views

Rewrite sender when relaying to provider server [duplicate]

I am trying to relay email thru my provider that has a mail server for my domain (xxxx.com). My postfix is configured as follows: relayhost = [smtp.xxxx.com]:25 the server requires authorization, ...
-1
votes
1answer
167 views

Secure postfix smtp from spammer

I run on Centos 5 with Parallels Plesk 12 and look for to secure my smtp server. When I watch at log, I see some strange line like that, which I supposed it's hack connexion. Has someone any idea on ...
3
votes
1answer
594 views

What does an empty AUTH EHLO SMTP response mean with MS Exchange?

I'm a programmer, not a sys-admin, but my customer's sys-admins are not being helpful and after much googling I still can't find the answer to this. My Java application gets the following response ...
0
votes
1answer
364 views

postfix smtp-auth with dovecot cannot authenticate

On Centos 6.5 i run postfix with postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = ...
1
vote
1answer
2k views

Exim4 SMTP server allows unauthenticated users to send emails

I use Debian 7.x amd64 + Exim 4.82 on a dedicated server, I also have a working SMTP server on a shared hosting. I would like to setup an SMTP on my VPS that will have some special delivery ...
6
votes
3answers
19k views

POSTFIX fatal: no SASL authentication mechanisms

I am struggling with the error above for more than 5 hours. I had tried to remove Postfix completely and I had followed the instructions of the next manual and the SASL manual in order to reinstall ...
-1
votes
1answer
323 views

Exchange 2010 view SMTP authentications

Is there a way to view authenticated SMTP Sessions? We are getting lots of SMTP traffic in our tracking logs at odd hours of the day. What I'd like to do is to see which user(s) are sending SMTP ...
1
vote
1answer
717 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
652 views

Email server fails to authenticate my client, returns “use web to login”

I'm trying to send a mail message using System.Net.Mail.SmtpClient via Yandex Mail and have the following transcript: S: 220 smtp17.mail.yandex.net ESMTP (Want to use Yandex.Mail for your domain? ...
1
vote
1answer
334 views

Postfix security: Accepting emails for and sending emails from my domains only

I have a virtual server running Debian Wheezy, and I am trying to configure it as a Postfix mail server. I haven't found though any easy to follow tutorial on how to secure Postfix... and my mail.log ...
0
votes
3answers
2k views

Can I send email unauthenticated to an internal SMTP server which then relays onto authenticated SMTP?

I have a back-end system which only supports sending email to an *UN*authenticated SMTP server, however, ultimately it needs to go via an authenticated SMTP server on the public internet. My idea was ...
0
votes
1answer
78 views

Spamming from Exchange 2003

I am apparently spamming the world (about 1000 a day) but cannot figure out how. Mxtoolbox does not list me as an open relay and I have disabled all relays that I can find. I have run every virus ...
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votes
1answer
446 views

How to do Postfix accept outgoing mail from another internal servers

I have a MTA with Postfix SSL/TLS configured and sending messages perfectly fine. In the same internal network, I have other servers that I want to send mail through this MTA. In main.cf variable ...
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votes
2answers
4k views

centos 6.4 sendmail SMTP-AUTH not working

I want cinfugiure centos 6.4 server with sendmail and dovecot to SMTP-AUTH , I configure saslauthd and sendmail, but the SMTP-AUTH is not function,actual configuration is [root@server sasl2]# rpm ...
-1
votes
1answer
268 views

SMTP , they are hacking my server spammed? [closed]

2013-04-15 18:12:55 217.119.50.209 OutboundConnectionResponse SMTPSVC1 ADSERVER - 25 - - 250-blue-ld-242.synserver.de 0 0 28 0 359 SMTP - - - - 2013-04-15 18:12:55 217.119.50.209 ...
0
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1answer
2k views

Postfix on Ubuntu tried everything, won't send emails

I'm trying to get postfix set-up on Ubuntu 13.04 but no luck so far. I found a few answers here on ServerFault that didn't work. I re-installed a bunch of times, nothing. This is my first time dealing ...
2
votes
1answer
273 views

Enabling smtp authentication on postfix with users in another smtp server

I am trying to replace an existing qmail installation with postfix. Qmail is currently authenticating outgoing smtp from users clients with a perl script. This script checks user's provided ...
1
vote
1answer
1k views

Exchange won't log in to smart host

My Exchange 2010 server is configured to relay mail to a smart host. Basic authentication is required over TLS. For some reason, Exchange doesn't feel like logging in. I see the following error ...
0
votes
1answer
954 views

Postfix: Relay access denied through SASL with permit_sasl_authenticated setted

I have Postfix 2.7 installed in Ubuntu 10.04 LTS. When I try to send a mail from Outlook (with smtp auth) to a gmail account (or others), I get relay access denied. The log (I've faked the emails): ...
1
vote
1answer
2k views

Telnet to SMTP gets no 220 response unless user is specified

My server is setup to generate outgoing email only (no receiving), and is timing out when attempting to contact smtp.example.com Essentially the email is generated by a process on ...
0
votes
1answer
391 views

Postfix Authentication Issue

I originally followed this guide to get my mail server going. It works great but is a security nightmare, so piece by piece I'm securing it (anti virus, spam, smtp security, TLS) I'm currently trying ...
4
votes
3answers
743 views

Security Risk involved in disabling SMTP authentication on POP3 Server?

I provide IT Services to a client who, for the longest time in the world, has been using a POP3 server from Network Solutions to handle their email. At this time, I'm introducing the McAfee SaaS ...
0
votes
4answers
6k views

Postfix: Allow SMTP AUTH only from specified IP address ranges

can one implement an IP address based restriction for SMTP AUTH in Postfix? Scenario: I'm running a Postfix mail server that receives mails from all over the Internet. But the server doesn't only ...
1
vote
1answer
2k views

Postfix smtpd won't talk to saslauthd

I have an saslauthd setup to authenticate against PAM. It seems to do its stuff: root@sasltest:~# testsaslauthd -u quest -p #### -s smtp 0: OK "Success." I have libsasl 2.1.23, postfix 2.7.1. I ...
3
votes
2answers
5k views

Postfix “AUTH-LOGIN” no longer being offered for smtp auth after upgrade from Ubuntu 10.04 to 12.04.1

After doing a major Ubuntu dist upgrade from 10.04 to 12.04, my virtual-user postfix / dovecot installation only offers "PLAIN" SMTP Authentication mechanism. It used to offer PLAIN + LOGIN ...
1
vote
2answers
183 views

Postifx: how can someone send e-mail without authorization with this configuration?

Yesterday I found that 10 thousand e-mail messages were sent through my system using this configuration: http://pastebin.com/bThpH1s8 - main.cf http://pastebin.com/kkxxsstP - master.cf I temporarily ...
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0answers
1k views

530 5.7.1 Client was not authenticated Exchange 2010 for some computers within mask

We have a classic problem with Client not Authenticated but with a specific twist: We have an Exchange 2010 cluster, let's say EX01 and EX02, the connection is always to smtp.acme.com, then it is ...
5
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2answers
4k views

Can't get SASL auxprop/sasldb working with postfix/Ubuntu 12.04

I have an Ubuntu 8.04LTS system running Postfix 2.5.1. On that system SMTP AUTH runs fine. The contents of /etc/postfix/sasl/smtpd.conf are: pwcheck_method: auxprop auxprop_plugin: sasldb mech_list: ...
1
vote
1answer
5k views

Roundcube, Postfix and SMTP authentication (CRAM-MD5) error

I'm having trouble configuring Roundcube with SMTP authentification on Postfix. All the credentials are true, because I have no problem using the e-mail from Thunderbird and my mobile phone e-mail ...
2
votes
1answer
5k views

Postfix SMTP auth not working with virtual mailboxes + SASL + Courier userdb

So I've read a variety of tutorials and how-to's and I'm struggling to make sense of how to get SMTP auth working with virtual mailboxes in Postfix. I used this Ubuntu tutorial to get set up. I'm ...