The relay tag has no wiki summary.
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3answers
434 views
Postfix : relay access denied
Since I can't find a solution that works with my config, I lean on you guys to help me out with this.
I've installed postfix and dovecot on a CentOS server. Everything's running well. But when I try ...
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3answers
274 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 ...
1
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2answers
80 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 ...
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2answers
87 views
How to catch or filter specific sender or recipient
I have a bit of problem and I am pretty new in this field and I don't know how to set this. I have searched somewhere on the internet how to solve this but I don't really get all this stuff about ...
2
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1answer
514 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
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1answer
369 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 ...
1
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1answer
151 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
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1answer
324 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
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1answer
259 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 ...
0
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1answer
40 views
can Dovecot be used for relaying mail for user like a gateway?
I want to setup a gateway mailserver for relaying intranet users' incoming and outgoing email.
I've setup postfix for relaying mail, but I dont know if dovecot can do this.
e.g. Dovecot as gateway, ...
0
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1answer
47 views
Apache Module to hold connections | backend to DMZ - DMZ to backend
I'm looking for an Apache module or plugin which offers me the following functionality. I have an Architecture which includes the following components:
Internet: mobile device
External Firewall
...
0
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1answer
106 views
How to have Postfix send email to another server if user lookup fails for specific domains
Currently my server acts as a gateway, checks AD for valid email addresses, if the email address exists in exchange it sends over the email, otherwise just rejects (typical)
I need Postfix to send ...
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1answer
325 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 ...
0
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1answer
178 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 ...
0
votes
1answer
294 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 ...
0
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1answer
153 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
218 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
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1answer
361 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 ...
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1answer
204 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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0answers
65 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
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0answers
80 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 ...
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0answers
50 views
sm-mta strange outgoing messages
I noticed something weird today on my mail server. I had a message in my inbox that said:
Received: from myserver.com (localhost)
by myserver.com (8.14.3/8.14.3/Debian-9.2ubuntu1) id ...
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0answers
39 views
Use content_filter only on relay server (or - how to copy email to another server, but encrypted)
At first - maybe I will write what I'm trying to achieve. I'm using postfix as my main server on my private Linux machine in home. Everything works smoothly and without problems. However I want to ...
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0answers
83 views
Send mail thru a Qmail relay server with multiple IPs
I have setup a Qmail Relay server with a few IPs on a different provider than my usual one to use as a proxy because Hotmail banned all my company ASN, and of course my customers are not happy with ...
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0answers
153 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 ...
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0answers
2k 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 ...
