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1answer
541 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 ...
0
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1answer
367 views

MAIL_HUB / LOCAL_RELAY for multiple domains

I'm running a debian server that hosts multiple domains, each of them using google apps. I managed to get sendmail to deliver the emails from domain1.com by using the following in ...
1
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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 ...
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0answers
177 views

Relay Access Denied (state 14) on multi domain

I'm trying to create IMAP mailboxes on my company's servers using Dovecot and Postfix as incoming and outgoing servers. The problem is that we have few domains with different "A" records. I've ...
2
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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 ...
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2answers
415 views

dhcp relay through VPN

I am doing a school project. There are 3 sites wich are connected trough vpn, i have my server infrastructure at the head office. Which would be the best option; have a seperate dhcp server at each ...
0
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1answer
184 views

Relay mail from a subdomain

I have a postfix mail server serving domain example.com. I've set up another mail server serving sub.example.com, and it relays all outgoing mail to first mail server which sends it worldwide. But the ...
0
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1answer
74 views

Postfix : Open relay to script

What I want to do with postfix is have an open relay that accepts all emails. I then want it to push all the received emails to a script. I have found solutions, but they never specifiy on how to do ...
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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 ...
0
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1answer
669 views

Postfix: combine check_client_access and check_sender_access for Relayaccess

We have a mailserver running on Postfix. Only authenticated users are allowed to send emails. One client has a multifunction printer, which is configured to send scanned documents to an email ...
2
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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 ...
1
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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: ...
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1answer
185 views

Setting sendmail to send mail for another server [closed]

I have a server with CentOS+Plesk+Qmail, I want to set it to send mail trough another server (CentOS+Sendmail). What do I need to set at the second server end in order to accept and deliver email for ...
2
votes
2answers
820 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 ...
1
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1answer
511 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 ...
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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. ...
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2answers
555 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 ...
1
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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 ...
0
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3answers
328 views

why sendmail resolves to ISP domain?

I wish to setup a local mail server for debugging purposes using fedora 15 I set up sendmail, but there is a problem. When I'm not connected to the internet, the local mail server delivers correctly ...
2
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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) ...
0
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2answers
79 views

Mail “proxy” to add encrypted authentication support for legacy programs

There are some programs that my company use that do not support encrypted smtp authentication and using unencrypted auth is not possible (hosted on the internet by another provider, they will not ...
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 ...
1
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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 ...
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0answers
3k views

pfSense - simple DHCP relay configuration - how?

I am trying to figure out how I can have a machine on the "LAN" nic of pfSense get a DHCP address from a DHCP server on the "WAN" nic of pfSense (happens to be a Windows Server 2003 machine if that ...
2
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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 ...
0
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1answer
362 views

Configuring a Postfix backup server

I have a subdomain subdomain.mydomain with two servers server1.subdomain.mydomain and server2.subdomain.mydomain running CentOS 5.5. server1 runs a Postfix server for subdomain.mydomain that acts as a ...
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1answer
84 views

Exchange 2003 encrypt external relay

I have a Postfix server filtering emails for an Exchange 2003 server. From the firewall, all incoming emails are routed through Postfix, gets filtered before it is delivered to the Exchange 2003 ...
0
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3answers
1k views

Postfix: relay access denied

I never got my SMTP service working, now i'm ready to try again. The server is a FreeBSD 8.1-RELEASE-p1, postfix was installed as part of the Webmin/Virtualmin install.sh I have read Postfix Virtual ...
0
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1answer
167 views

Deny DHCP relay by corporate security policy

I've been presented with some odd "security conventions" in a large company I'm contracting with and am trying to get some perspectives on them. I need to build a number of servers virtualization ...
0
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1answer
254 views

Postfix Relay: An Entire Domain

Goal: Need to forward all mail destined for users @ domainA.com to users @ domainB.com. Using GApps for domainB.com. I setup a postfix relay that domainA.com's MX records point too. Able to send ...
0
votes
1answer
389 views

Client that relays through Exchange 2007 failing authentication

I have a client that uses AlphaPage First Responder to send pages to cell phones, pagers, etc. It can do everything but send out pages to cell phones fine. It sends cell phone pages through Exchange ...
0
votes
1answer
456 views

how to prevent open relay with exim

I have setup exim as a relay server running on nonstandard port. But now spammers have abused it as a relay server for them. How do I prevent this from happening? Can I still have my server as a relay ...
0
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3answers
536 views

SMTP relay to multiple hosts

We are in the process of switching our email from a locally hosted server to Google apps. We have a lot of users and I'd like to be able to switch them over one at a time so I don't get inundated with ...
1
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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 ...
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2answers
5k views

How to configure Postfix client relay to Exchange 2010 server

I'm getting (delivery temporarily suspended: SASL authentication failed; server myserver.com[xxx.xxx.xxx.x] said: 535 5.7.3 Authentication unsuccessful) when I try to relay mail from Postfix 2.5.5-1.1 ...
0
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3answers
379 views

stop postfix local relay / external mail server

i have decided to have a separate mail server for my app. When i use php to send email, postfix sends successfully to other domains(gmail.com etc), but uses local relay for the addresses hosted on my ...
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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 ...
0
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2answers
266 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. ...
0
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1answer
921 views

Relay access denied and policy rejection errors

I have two different errors when receiving mail from this server mailserver.santanderrio.com.ar[200.61.38.105]. postfix/smtpd[23015]: NOQUEUE: reject: RCPT from ...
0
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1answer
463 views

Can postfix relay or map to multiple hosts at the same time?

I would like, if possible, to have postfix relay THE SAME EXACT email to two locations at the same time(or close to same time). Not failover, but duplicates. Can this be done via relayhosts or ...
1
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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
2answers
320 views

Qmail: relay only from selected servers based on rDNS

I'm looking for a way to disable Qmail relaying for everyone, but allow one certain group of hosts to do so. These hosts all use the same identifying rDNS entry. In Exchange 2003, Postfix, Exim and ...
0
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2answers
162 views

outgoing mail for web app (multiple domains as sender)

I have a web app "myapp.com" that users can use to set up their own websites. Our application is written in php and should be able to do the following: send mails to our own users "from: ...
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
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 ...
0
votes
1answer
220 views

sendmail redhat

For some reason even after providing the sender's from adress my mails are not being delivered as from is missing as below maillog. Any suggestions? May 8 20:08:43 tawq02 sendmail[13443]: ...
2
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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 ...
0
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2answers
924 views

Postfix relay gives error 450 while it should be 550

we use postfix to do relaying. We get several messages like the following in /var/log/mail (slightly edited) Apr 13 13:30:29 linserver postfix/smtpd[1064]: NOQUEUE: reject: RCPT from unknown[$ip]: ...
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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
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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 ...