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1
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1answer
26 views

Postfix with virtual users won't send mail to domainname on server

A debian mailserver with postfix and courier is able to receive and send mail for domains listed in virtual_mailbox_domains without a problem. But if there is a mailadress used that is used during the ...
0
votes
2answers
120 views

Postfix: Helo command rejected: Host not found

i have a Postfix 2.9.6 running on Ubuntu with the following configuration https://gist.github.com/anonymous/400fb4afa05e18c6da2b and i'm suffering the following issue where a valid client tries to ...
0
votes
1answer
166 views

Postfix Connection Timed out

I used the tutorial below to setup postfix and dovecot on a Digital Ocean server. But I'm getting "Connection Timed out" when postfix/smtp tries to deliver an email to a remote host like gmail or ...
1
vote
2answers
82 views

Postfix can not send to some mailservers: 'not logged in'

I have setup a Postfix stack (with Dovecot and Spamassassin, ClamAV + Amavis) which is working pretty good, actually. It relays my emails (I am using Thunderbrid as client) to other mailservers. I ...
0
votes
0answers
42 views

Postfix: Server to Server encrypted communication

I just built a Postfix, Dovecot and Spamassassin (ClamAV + Amavis) stack on my dedicated server. In the last two years I was using iredmail, wich was OK, but I was a bit sceptical because of my lack ...
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votes
2answers
125 views

Our exchange server is sending out a lot of spam [closed]

We have an exchange server 2003 and our IP address was blacklisted. When I check the Queue folder in the exchange server root directory, there are tons of Delivery Status Notification (Delay/Failure) ...
-1
votes
2answers
44 views

Postfix Configuration files

Kindly find your help on th below :) I am about to install postfix 2.10.2 on my RHEL server 5.9 I'll do this via source code. I need to reconfigure paths in main.cf, Example: /etc/postfix -> ...
2
votes
2answers
55 views

how to Dedupe email messages in exim mail server (Linux)

If a User is listed in multiple aliases or multiple mailing list or groups a message is sent to more than one of the aliases, mailing list or group the end User will receive multiple copies. How to ...
-1
votes
2answers
139 views

Opened some ports with iptables but they aren't open

I'm running a Debian 7 server via Linode VPS, and have recently installed/configured a mail server using Postfix and Dovecot. The final step to complete this was to open up ports 993, 995, 465, and ...
0
votes
0answers
31 views

Passproxy issue in apache - citadel installation

i am running apache with serveral virtualhosts. To configure Citadel, i am running WebCit along with the apache (which is recommended option by Citadel). Appache should ideally forward it the ...
1
vote
2answers
142 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 ...
2
votes
1answer
77 views

Is Sender Policy Framework (SPF) effective in preventing Phishing emails?

As defined in RFC4408, Sender Policy Framework only checks the envelope sender (aka MAIL FROM). The From: header is not being tested. As it is the value of the From: header which is usually displayed ...
0
votes
3answers
40 views

Using another mailserver and domain because of spam status

A customer (customer.com) kind of abused a mailing service (iContact) by sending to much promotions. They used their main email as sender (info@costumer.com). Because of that action, hotmail banned ...
1
vote
1answer
271 views

Postfix smtp mail to external hosts not possible

I administer a server (Ubuntu 12.04 LTS) running a web server and a mail server - The web server is running all fine, but the mail server is a problem. I have Dovecot installed and configured ...
1
vote
3answers
140 views

How to prevent Linux server from spamming?

I installed mail scanner for spam protection, but is there any script for Linux to notify me or email me that some one spaming on my server ?
-4
votes
1answer
91 views

Web server and mail server on same machine? [duplicate]

I just purchased VPS from DigitalOcean and installed LAMP but stuck at mail server. We get 5000+ visits/day and we do sent newsletters to our 10000+ subscribers 2 to 3 times a week and want about 20+ ...
0
votes
2answers
67 views

Using the same VPS for web server and mail server

I'm considering moving to a VPS for my web hosting needs (my own site and a few customers; nothing major - a few hundred visitors a day, and occasionally a few thousand). Since I'm unhappy ...
-1
votes
1answer
55 views

Storing mail server data on multiple storage servers [closed]

I'm trying to provide an email service for my clients And i like to know is it possible to store mail-server data on different servers Something like cloud services I'm a beginner , And i have ...
0
votes
1answer
35 views

How can I maintain ubuntu 12.04 servers without a mailserver running on them

How can I run an ubuntu 12.04 server without a mailserver running on it? This is for improved security and easy mantenance. I don't need mails processed on the system, I read the log files instead. ...
0
votes
1answer
200 views

AWS EC2 Mailserver Failover Strategies done right

I'm researching in this topic really hard the last few days and i just want to discuss this with a few specific questions - i did not find any suitable thread here that is covering my needs and ...
0
votes
0answers
71 views

Can I setup DNS on new server and “flip the switch” later?

I would like to know if setting up DNS/BIND on a new server will mess up my old server. Here is my situation: example.com - Main server used for hosting - Domain registrar currently points to ...
0
votes
1answer
211 views

IMAP Folders with Ubuntu 12.04 mail server: postfix-courier-ssltls-spamassassin-clamav-amavis

I setup this mail server a few days ago according to this tutorial, worked fantastic: ...
1
vote
1answer
64 views

Connection Time out on Email forwarding

I have a situation when forwarding from postfix mail server to yahoo,gmail,aol,icloud and many others forwarded email delivery to major ESP stopped at once though it works for my company email and the ...
0
votes
2answers
367 views

How to find emails sent,deferred, bounced with logs on exim mail server?

I am new to exim mail server. Now i need to findout the number of sent, deferred , bounced emails through logs. Since in postfix I will do things through grepping. Is there any way to find in exim ...
0
votes
1answer
68 views

How to create a read only email account on postfix mail server?

I need to create a read only email account in a postfix mail system. Could anyone help me how to do this on a postfix systems ? Your help is greatly appreciated ! Regards, Karthick
0
votes
2answers
503 views

What step blocks mail forwarded from own domain to gmail [closed]

I have my own (personal) domain where all email sent to this domain is forwarded to my Gmail account. For this purpose I use the ZoneEdit MailForward function. Since about 3 days (without changing ...
2
votes
1answer
338 views

Postfix - how to block emails sending out to a particular domain

I am having Postfix installed mailserver and I am using that server for legitimate purpose only. I need to block some outgoing emails for a particular blacklisted domain. Is there anyway to do ...
-4
votes
2answers
104 views

POP download from now on [closed]

Is it possible to configure options on email server containing Postfix and Dovecot, features similar to Gmail settings: Enable POP for all mail (even mail that's already been downloaded) Enable POP ...
2
votes
2answers
460 views

Cannot receive greeting message from remote mail server

I am trying to setup a mail server (postfix & dovecot) on Ubuntu. However, I cannot send/receive email, and get a similar error like posted in Postfix: lost connection with *somehost* while ...
0
votes
0answers
135 views

Cannot authenticate PAM IMAP dovecot server

I have recently followed this tutorial to set up a mailserver on my Debian Linux box. When I try to authenticate myself with telnet it just kicks me out if I don't specify a domain name and when I do ...
1
vote
1answer
85 views

Can I use MX records to deliver some addresses to Google Apps and some to my server?

I have whm installed on my VPS, which my domain MX records are pointing to: 0:mail.mydomain.com and whm/cpanel has mail forwarding rules which pipes certain @mydomain email addresses into my CRM ...
3
votes
2answers
137 views

Mail Server suggestion for large inboxes

The employees in the company that I working are using mails alot. Some employees have more than 20GB of mail archive (Checked from Outlook data files). I am using hMailServer for mail server. The ...
0
votes
2answers
158 views

I've got very brazen pop3 attack how to protect the server?

Today I have brazen attack to my pop3-dovecot server and mail log is full over (200MB) with this kind of information: Nov 11 09:28:14 lax dovecot: pop3-login: Aborted login (auth failed, 1 attempts): ...
1
vote
1answer
127 views

limit size of error reply in qmail

We are using qmail as a mail server. If a user sends an email that cannnot be delivered he get's a message back from qmail with some details about this error. Hi. This is the qmail-send program at ...
0
votes
2answers
688 views

Block user from sending Email to the outside in SENDMAIL

I have a CentOS server with Sendmail installed and use Fetchmail for mail retrieval. My email server is working perfectly, but I now need to prohibit a user from sending emails to the outside. How ...
1
vote
1answer
408 views

When pointing to new DNS servers is there any chance of E-mails being lost even if the old E-mail hosting service is still up?

I am changing webhosts and will be using the new hosts mail servers instead of the old ones. I have created all the correctly named mailboxes on the new service but have also not yet cut ties with ...
-3
votes
1answer
192 views

Update namecheap domain records to smartermail server

I have installed a smartermail server on my Windows Azure web instance. I was able to send a test email (and receive it in my yahoo inbox), so I assume that everything on the Azure end is already ...
-2
votes
2answers
163 views

which mail server is better suited for high volume? [closed]

I'm planning out a project (web/mobile app) that would require a mail server that could handle hundreds of thousands connections per hour (both IMAP/POP and SMTP) and has the ability to interface ...
1
vote
3answers
273 views

Can a webmail client interact directly with the SMTP server? (without IMAP)

I'm trying to understand how all the components of a mail server fit together. I understand that the SMTP server is necessary to send emails. In terms of accessing email, I'll setup a webmail ...
0
votes
4answers
526 views

Web- and DB-Server: High clock rate and less cores vs. less clock rate and many cores

I am currently looking into setting up a new infrastructure for a hosting project of mine. Basically it will be managed hosting with a strong focus on Django-based apps. All will be Linux-based of ...
-2
votes
2answers
180 views

How Can I Load Balance Outbound Email?

My server have four external IP address. I want to distribute to this IP addresses for sending emails. For example : 1.st mail sending XX.XX.XX.10 ip 2.nd mail sending XX.XX.XX.11 ip 3.rd mail ...
1
vote
2answers
181 views

postfix sort mails using a cronjob

My mailserver consists of dovecot and postfix. I am receiving alot of mails from different mailing lists. These mails should directly go into my inbox when they come in, because it is easier to ...
2
votes
1answer
334 views

How to secure postfix to find out whether the emails are coming really from the sender?

Is it possible to secure postfix in a way, that incoming emails are checked on whether the email comes really from the sender? Is that possible to write php script and chose a sender, like the mail ...
1
vote
3answers
2k views

Do I have to have an ssl certificate for my mail server?

Question is really simple. If I want to setup a mail server, do i have to have it or is it just a security issue? What kind of problems can it cause?
1
vote
1answer
160 views

Procmail variable to command

Maybe stupid question, but I can't find it anywhere. I have a variable in procmail (eg $SUBJECT) and I need to push it to some shell command. Something like: # in /etc/procmailrc ...
0
votes
1answer
482 views

Issue with sending mails from thunderbird via postfix

I run into problem where I cannot send mail via SMTP by using for example Thunderbird - but locally from machine, mail sending works perfectly fine. Mail server got configured also dovecot - that is ...
3
votes
1answer
402 views

What is the best way to setup redundant pop servers?

I am in charge of setting up our company email infrastructure and have a question on how to setup redundant pop/IMAP servers. I understand that I can setup failover for inbound email using MX records ...
0
votes
4answers
786 views

qmail to zimbra migration

I am not a mail server admin, however I've been given the task to migrate our company's current qmail server (running on Ubuntu 8.0) to a new Redhat Enterprise Linux server (RHEL 6.2). After doing ...
1
vote
2answers
1k views

Dovecot install: what does this error mean?

I have postfix and dovecot installed on CentOS 6 (linode) along with MySQL. The table and user is already set up, postfix installed fine, but dovecot gives me this error in the mail log: Warning: ...
0
votes
1answer
244 views

Archiving mails with postfix: how to filter mails?

i wanto to implement the following scenario: we use a postfix mailserver. to archive all old and new mails, i want to setup a second postfix on our fileserver and create a single mailbox "archive". ...