2
votes
1answer
85 views

Postfix TLS connection not verified

  Hi! I am in the process of setting up postfix. What I want to achieve is trusted TLS connection between all internal parties. We deployed a PKI infrastructure with a Windows Server 2012 R2 ...
-1
votes
2answers
48 views

postfix and exchange connection

I have a local Exchange Server which has a dynamic internet ip. So I have setup a dynamicdns server for this server. The server is my main mail server. Now I have a public domain and a postfix server ...
0
votes
1answer
242 views

Migrating from Postfix/Dovecot to Exchange

The place I work at is currently using Postfix/Dovecot on CentOS 6 for our mail. We will be migrating to Exchange 2013 on Windows Server 2012 in the future. I have been put in charge of this task and ...
1
vote
0answers
98 views

Postfix sending corrupt pdf attachments to exchange

We have a php web application that creates pdfs and send them to users , everything worked fine on a centos 5 with postfix 2.3 , we want to upgrade to centos 6 with postfix 2.6 . sending to gmail or ...
0
votes
1answer
37 views

Postfix deliver to inhouse Exchange never arrives

When I send a message though postfix to clients who have an inhouse exchange server the message never arrives. The strangest thing is it is being delivered as postfix responds with a 250 queued for ...
0
votes
1answer
1k views

How to set Return-Path header of postfix bounced messages

i have an debian6 with postfix and dovecot. A customer has an Exchange wich connects with an POP3 Connector onto some mailboxes. The postfix relays messages for the exchange server. Bounced messages ...
0
votes
1answer
885 views

Postfix + Exchange + ActiveDirectory; How to mix them

My client has got many sub-offices, and one head office. The headoffice has a domain name: business.com All users in the many sub-offices need to have a headoffice email address: ...
3
votes
2answers
1k views

Authenticating to Exchange 2010 smarthost?

I have a postfix mail server that should relay all outgoing mail to an Exchange 2010 server (the Exchange box is my smarthost). I have administrator access to the Exchange 2010 system, but I'm not ...
1
vote
1answer
178 views

LAMP server domain can't send e-mail to Exchange server domain.. Different IP's but both on same network

So I have 2 different domains hosted on different servers. domain1.com is hosted on Windows: - DNS(MS) is 10.1.1.39 - WEB(MS) is 10.1.1.21 - Exchange(MS) is 10.1.1.180 domain2.com is hosted on ...
0
votes
1answer
122 views

Mailserver 1 <--X--> Mailserver 2

First I try to explain my server environment. I have two virtual servers, the host server is Ubuntu. The mailserver is Debian Squeeze installed with this tutorial: ...
1
vote
0answers
79 views

Check Exchange Quota Usage from Postfix / Prevent Backscatter With Postfix+Exchange

we have some troubles with our Mailsystems at the moment. We have an postfix server, handling all incoming mails and forward them to the correct internal mailsystem. This works well with the most unix ...
-1
votes
2answers
72 views

email dropbox between two mutually untrusted sites

I've an interesting problem that I thought was straightforward, but turns out I think I'm whistling down the wrong path. It has to do with (shudder) email. I thought I was done with needing to ...
0
votes
1answer
714 views

Forwarding mail from Exchange 2003 to Postfix

This has been kicking my butt for some time now and i'm reaching out for help. Here is the scenario: There is 1 Exchange 2003 server which lives on mail.example.com. It has 1 SMTP Virtual server and ...
3
votes
1answer
176 views

Microsoft Hosted Exchange: Possible to outsource single mail account?

I have a customer who polls e-mail for a number of accounts in domain example.com via POP. Now they have a VIP user boss@example.com who wants to use Microsoft Hosted Exchange on his mobile phone. ...
0
votes
1answer
82 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 ...
2
votes
2answers
1k views

issue using Postfix as authen SMTP client relay to Exchange 2010

I'm using postfix to relay mail to Exchange 2010. Here is my config: relayhost = [smtp.exchange.2010] smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/relay_passwd ...
0
votes
2answers
439 views

SMTP Relay to Multiple Hosts

I have a situation where I need to configure an MTA to relay messages for a single domain (@example.com) to multiple (3) seperate SMTP servers. Email for user@example.com received on SMTP-1 needs to ...
0
votes
1answer
140 views

Mail sent from local Postfix marked as “possible phishing” in Outlook

Sorry for the newbie question--this is not my area of expertise by a long shot. I work at a small development shop and we finally got around to doing code reviews. (Yay!) I set up an instance of ...
1
vote
2answers
2k views

Postfix to Exchange Migrate Mailboxes

Has anyone migrated from postfix to Exchange and moved saved mails forward? I have been asked to move about 150 mailboxes, and I would rather avoid going down the Outlook/PST route if possible.
1
vote
1answer
165 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
3answers
948 views

How do I make exchange forward email to a non-exchange mail server (postfix on mac)?

I'm not sure what I'm doing. Exchange has been working a long time. I just installed a mac mail server postfix/dovecot. They both work but not together. If I send email directly to the new server ...
3
votes
5answers
517 views

Preferred mail system/server for a company?

Say you are responsible for setting up an email solution at a company. Which would be your choice? I know of the following options, but many of them not well: Gordano Mail System Exchange Exim ...
2
votes
2answers
1k views

Postfix relay with Exchange Server

Is it possible (or even logical) to use Postfix as relay MTA with Microsoft Exchange Server 2007, and if so how?
1
vote
9answers
2k views

What is the best mail server for a university with a large amount of users?

We have about 10,000 users in our university. What I'm looking for is which mail server is appropriate for our university? We used daemon before. The most important things for me are stability, ...
1
vote
2answers
916 views

Messages released from MailScanner quarantine are marked as DUPLICATEDELIVER in Exchange 2007

I have installed Postfix with MailScanner on CentOS 5.4 as a smarthost for Exchange 2007. When a message gets quarantined and I later release it ...
1
vote
1answer
2k views

Sharing single SMTP domain between Postfix and Exchange

Greetings. I have a working Postfix configuration, but no Postfix admin. Mail is being correctly delivered to all recipients. Spam filtering, etc. all work fine. I want to configure Postfix to share ...