The tag has no wiki summary.

learn more… | top users | synonyms

5
votes
1answer
2k views

How do I config postfix to use multiple google apps user accounts?

I have a postfix installation and have setup relaying through google apps, but when I send mail to postfix it relays it to google apps using the ONE account I have specified in the main.cf. Is there ...
3
votes
2answers
316 views

Intermediate SMTP server (exim), how to handle backscatter?

I have a dedicated Ubuntu Lucid box at a hosting provider that is my backup MX (running exim4 4.71-3ubuntu1.4) for domains that I have configured on an Exchange 2007 server on my LAN. So my Exim ...
3
votes
1answer
3k views

How to make sendmail to relay local mails?

I have www server called say mywebsite.com and mail serwer mymail.com. Mail for mywebsite.com is handled by mymail.com (mx record for mywebsite.com is mymail.com). Problem is that I want to send mails ...
3
votes
3answers
447 views

Relay access denied

In 2008 I set up a simple mail server (running ubuntu 8.04 LTS) to allow local automation controllers to send email alarms without limits. I used to use gmx, but found that if an account had a ton of ...
2
votes
3answers
164 views

DHCP Relay vs Multi-Homed DHCP Server

I'm sketching out a new network topology and I'm unsure of how to solve the issue of DHCP between two VLANs. 10.50.2.0/23 will hold the majority of our users, corporate wifi, printers etc. ...
2
votes
2answers
191 views

Multi-site email relay based on email address (in AD?)

We have a multi site setup currently based around Exchange 2003, but we are getting a lot of traffic over the vpn as only one server has an internet facing IP. Is there such a product that could sit ...
2
votes
2answers
824 views

DHCP server identifier and DHCP relay

I have a DHCP server serving a number of subnets over a DHCP relay. When it sends out DHCP offers it sets the server identifier (option 54) to its own IP address. When the clients need to renew they ...
2
votes
2answers
210 views

Linux NetBIOS name relay

I have a bridge, over WiFi, that is using parprouted to fudge ARP so that routing works. Is there anything like dhcrelay (which relays DHCP requests) but for NetBIOS (Windows File and Print Sharing) ...
2
votes
1answer
337 views

Queue bounced emails using Postfix with an SMTP relay

I have setup a Postfix mail server that use a relay mail server to deliver the emails. The problem I am having is that from time to time the relay server goes crazy and block my relay ...
2
votes
1answer
247 views

Exchange 2007 Open Relay

Apparently our domain has been spamlisted, and a check has revealed that we're an open relay. Internally we have just one mail server, Exchange 2007. No edge transport. Send connector is ...
2
votes
1answer
178 views

postfix transport relay access denied

When message arrives from other mail server (yahoo/gmail) on my postfix server it gets denied and not being transported using the transport on my configuration. Been checking whole day can't find ...
2
votes
1answer
916 views

Exim Prevent Mail Sent by Relay

Currently it appears that somehow someone is using my server to send spam as I'm seeing 100's of rejection emails from other email services (such as gmail) saying the message could not be delivered ...
2
votes
2answers
559 views

How to configure postfix to permit relaying from some ip address but only using one domain as sender

I was looking for this but I can't find any thing. I want to permit one ip address to relay mails by my servers but only using one domain as sender. Can I ? If yes, how. I use postfix 2.9.4. Sorry my ...
2
votes
1answer
284 views

How can I set Qmail to relay all mail to one address

I'm new to qmail it's setup and working like it should. I need to set it to do something a bit different. I need it to take all mail that would be incoming to it and relay all of that to one address ...
2
votes
1answer
596 views

Zimbra MTA settings

Hi have some questions for Zimbra v8.0.6GA. Under Configure -> MTA -> Network, I'm seeing a few settings and am not very clear what to do with them. Web mail MTA Host name Is this for delivering ...
2
votes
1answer
727 views

Relay Access Denied (State 13) Postfix + Dovecot + Mysql

So we have been scratching our heads for quite some time over this relay issue that has presented itself since we re-built our mail-server after a failed Webmin update. We are running Debian Karmic ...
2
votes
1answer
498 views

ASA5505 DHCP relay to server 2008 R2 DHCP server

We have split our network up to add further security. I observe that the DHCP relay is working correctly and forwarding the packets to assign the IP address, but it's not appearing under "leased ...
2
votes
0answers
67 views

secured (relayed) NX setup

I am constructing a "secured" NX environment, and need some help. The situation is: there are 3 machines, A, B, C, where B is the "gateway" between A and C, in another word, A and C can never ...
1
vote
2answers
545 views

Relaying mail through postfix with SASL

I'd like to relay mail from my laptop through my server. I've successfully configured postfix and SASL, and I can AUTH successfully using telnet. dhcp-241:~ jgorset$ telnet mail.example.com 25 Trying ...
1
vote
1answer
68 views

How can I relay mail to multiple SMTP servers?

We want to use Google Apps for Domains as our email service but the "corporate" office want's the emails in Exchange. I would like to set up a relay (is that the proper term) to send any incoming ...
1
vote
1answer
341 views

Postfix smtp test occured “Relay access denied”

I was following the tutorial http://wiki.centos.org/zh/HowTos/postfix_restrictions but, when I tried to send a mail with smtp, it returns: Connected to XXX.XXX.33.22 (XXX.XXX.33.22). Escape ...
1
vote
2answers
1k views

Postfix dynamic smtp_helo_name

I have a mail server that relays e-mails for two different domains. I want the smtp_helo_name to be different based on the domain. I'm assuming there is no way to do this via checking the mail ...
1
vote
2answers
189 views

Grant relay to servers based on AD security group membership

We're moving our relay from an Exchange 2003 server to an Exchange 2010 server. I was hoping the "Grant or deny relay permissions to specific users or groups" option would still be available in some ...
1
vote
1answer
543 views

CentOS 6.2 sendmail: how to control the ip number used when relaying mail to mx.google.com

The overall context for this is that I am sending mail from a web application on one machine through sendmail on another machine, to final destination being a pop account on mx.google.com. The latter ...
1
vote
1answer
245 views

relay_domains seems to be ignored by postfix

I am trying to set up a perimeter spam and malware filter using CentOS/Postfix/SpamAssassin. Unfortunately, I am still stuck on the PostFix part. I've setup a new subdomain DNS with its own A/MX ...
1
vote
3answers
2k views

Postfix “loops back to myself” error on relay to another IP address on same machine

I'm trying to relay all mail for one domain "ourdomain.tld" from Postfix running on port 2525 of one interface to another SMTP server running on port 25 of another interface on the same machine. ...
1
vote
1answer
3k views

Exim Problem: Sender address rejected: need fully-qualified address

My mail log returns the following error when sending email to a gmail account: Sender address rejected: need fully-qualified address Here is the full error message: 2010-10-08 03:44:58 ...
1
vote
1answer
167 views

Delivering from Postfix to Exchange

I have someone with two domains, a.com and b.com. a.com is running a postfix server on the mx host for the domain and I have total control of the server. b.com is running an exchange server on the ...
1
vote
2answers
365 views

Postfix allow relay with username and password

I have almost default configuration of Postfix How can I configure Postfix to ask for username/password before relaying mail from other than "mynetworks" IP's? Thank You very much
1
vote
2answers
254 views

Postfix: Transport Maps via Third-Party Relay Host

I have my website and email hosted with a shared host. Unfortunately their servers are using CPanel, so they are limited in their spam protection options. I also have a VPS that I use for testing ...
1
vote
2answers
113 views

Two servers, one is a Postfix relay of the other, can I divert root emails from the other?

So, I have two servers, I will call then Internal and External. When I send emails within Internal postfix, it gets relayed by External which does the job of actually sending the email. Normal relay, ...
1
vote
1answer
90 views

Relay HTTP request through other servers and back

I have 6 Ubuntu cloud servers, which of one acts as a main Django deployment with an intranet and cronjobs. For the cronjobs I request data from different data-sources, that I want to go through the ...
1
vote
1answer
158 views

How to redirect external web request to localhost's testing server

Some web services calls my web application(www.myapplication.com/external_update_handler). I need to test those requests locally, so I'd like to know your opinions about how can I "redirect" those ...
1
vote
1answer
189 views

Need an open SMTP relay for testing

I'm developing some HTML email templates and have a internal test tool that can send out test emails to my own email address for QA purposes. Unfortunately this tool's settings page allows the mail ...
1
vote
1answer
357 views

Conditionnal relay in postfix

I use postfix to send direct email. But, I use a relay to send email for specific senders. So I use "sender_dependent_relayhost_maps" : /etc/postfix/main.cf : relayhost = transport_maps = ...
1
vote
1answer
974 views

postfix 5.7.1 Relay access denied when sending mail with cron

Reluctant to ask because there is so much here about 'postfix relay access denied' but I cannot find my case: I use php (Zend Framework) to send emails outside my network using the Google mail server ...
1
vote
1answer
2k views

Mailman cannot relay e-mails to non-local domains

My e-mail server runs Debian with postfix, dovecot, amavis, mailman, with postfixadmin in a virtual domain setup. All works fine, except for mailman which is not able to relay e-mails to non-local ...
1
vote
2answers
83 views

stop postfix relay from internal network

I'm using Postfix 2.7.1 (can't change to a newer version for the moment) and it's running fine, with the exception that is allowing to relay mail from the internal network even if the specified sender ...
1
vote
2answers
423 views

Sendmail: Mails are still being relayed to root@localhost

I am running CENTOS 6.2 with 2 virtual machines one 'auth'(192.168.0.2) and another proxy (192.168.0.3). Proxy has no internet connection. My intention is for proxy to send its mail to auth and auth ...
1
vote
1answer
155 views

Redundant mailservers. Route messages from internal users to secondary site

I have 2 mailservers running ZIMBRA (primary - site1) and (secondary - site2) in two separated locations (sites). When my primary mailserver in AVAILABLE the seconray are just syncing (rsync) with ...
1
vote
0answers
403 views

ubuntu 12.4 relay access denied postfix

I have been reading all relay access denied in this forum with no luck. Most of those issue have to do with some other packages that work with postfix. I hope you can help me here since this may be a ...
1
vote
1answer
177 views

openvpn& iptables — portforwarding and gateway

The problem is similar to this scenario: iptables rule still take effect after deleted Scenario: There are several clients(C1~C10) providing some services, such as SSH,HTTP..... The clients are ...
1
vote
1answer
410 views

Sending mail from different IP for each domain

I have on one server domain1.com domain2.com domain3.com on CentOS and Qmail. I want them to send email trough a second server that uses ip1, ip2, ip3. I can easy do this by editing this Qmail file: ...
1
vote
1answer
512 views

Relay/forward only mail that originates from specific domain using postfix

I have 2 postfix servers (lets say mail.aaa.tld and mail.bbb.tld) that acts as a relays for several domains (lets say x.com, y.com, z.com) that are composed at ccc.tld. SMTP server at ccc.tld can ...
1
vote
3answers
182 views

Apache relaying to prevent DoS

I've been wondering, is there a technology that relays (slows down) responses to a given IP according to the rate It makes requests? E.g I have an apache server with a "heavy" API service that I want ...
1
vote
2answers
82 views

Exchange 2007: relay only from selected servers based on rDNS

I'm looking for a way to make Exchange 2007 only accept mail from a certain group of hosts. These hosts all use the same identifying rDNS entry. Exchange 2003 uses a whitelist based on the reverse ...
0
votes
1answer
34 views

How to use services secured by our gateway IP from clients outside our network?

I work for an organization that uses a managed host for App1 and a collection of apps, App2..N App1 is a web application, hosted on a linux webfarm by a large vendor - and it uses a forms-like ...
0
votes
2answers
557 views

Postfix relaying to gmail now deferred

I have several domains on my VPS server, and postfix relaying the email to the appropriate gmail accounts via a virtual users table. This week I performed a sudo apt-get upgrade, this may be ...
0
votes
1answer
1k views

sendmail helo rejected localhost.localdomain

I set up a Server A with sendmail running, just for sending emails for other Servers. I put: Connect:[Server B's external IP] RELAY in /etc/mail/access file and compiled to ...
0
votes
2answers
542 views

Local domains vs “relay domains”

I have a vague notion but I'm not clear on the difference between local domains and "relay domains" I believe that local domains are "localhost" and any other aliases you set the server up to mean ...