General :: How To Config Internal And External Email Using Postfix
May 26, 2011
I am using postfix and dovecot installed in one machine running linux centos 5.4 and I have two lan card eth0 and eth1
the eth0 is my IP from ISP
the eth1 is my internal IP
Now since my postfix and dovecot are started without any errors what I mean is. I can able to send in yahoo,gmail,etc... and also i can recieve email from outside. My question is how can I restrict this email address prinzz@prinzz.com denied for outside but can send and recieve only in internal while this prinzz2@prinzz.com is allow to send and receive outside and inside.
I have been running an email server on a Red Hat 9 system for 5 years, and wanting to upgrade it to the latest Fedora OS. A few days ago it crashed. The server is running Fedora 11 (up-to-date). Clients are Fedora 11 and Windows XP machines using Thunderbird for accessing email. The server is running Postfix and Dovecot. Within my local network I can send and receive emails. I can also send email to addresses outside of my local network. The only problem is that I cannot receive any email from outside the local network. I cannot think of anything aside from my firewall (iptables) or postfix config that could be causing the problem.
Below are my iptables file, and the postfix main.cf changes that I have made. Iptables (the same file I was using on Red Hat version 9 with one minor deprecated syntax changed): *nat :PREROUTING ACCEPT [22:1894] :POSTROUTING ACCEPT [14:840] :OUTPUT ACCEPT [17:1356] -A POSTROUTING -o eth0 -j MASQUERADE COMMIT *filter .....
I have an email setup where all of the emails from our email host is downloaded to our Linux server using Fetchmail. Then some of the incoming emails are sent to an MS exchange server (server1.domain.com) using Postfix. What i want to do is to send a copy of all emails to Another server (server2.domain.com) for redundancy.Can postfix be configured to send copies out to both?
I have an external hard drive with an xfs partition on it. It was using an external journal, but in re-installing Slackware I removed the partition holding the external journal, forgetting what it was at the time. I didn't touch the contents of the external hard drive, but now I can't mount it and the various xfs programs seem to demand that it be mounted in order for them to change anything.Anyone have any ideas on how to change an xfs partition from external log to internal? Failing that, how do I get the information off it?
I am tired of managing local Address Books and Calendars. I use either POP or IMAP email accounts now and want to keep the email accounts I have. What is a good Mail Server I can setup to Let me use a Global Address Book and Shared Calendar System between Outlook 2003 and Evolution, but not create email accounts? In Other words I want a Local Server I can setup that does nothing but manage a Global Address Book and Calendars. I want to keep using POP and IMAP accounts for the email side of things.
Send an E-mail to your local account. Try two different ways to send and read it. How can you check that it really arrived? I decided to try using the 'mail' and 'pine' commands. So:
1) Using the root account, intending to send an e-mail to myself (root):
Code:
# mail -s "Hello root!" root Simple form of sending e-mails internally. ^D (this keystroke is to finish the e-mail) EOT
2) Using 'pine', another e-mail client: The mail is composed correctly, with 'To:' field set to:
Quote:
[URL]
which is my hostname, as my box runs in a VMWare Slack 12.2 image. In both cases, nothing was received in my mailbox (by typing #mail)... Additionally I don't see any new e-mails when I look at the file '/var/spool/mail/root'. Do I need extra information configuring my mail client/server/service?
Currently i'm figuring out how to send email notifications to users when services went down in Nagios. I know i need to install and configure Postfix, which i did already. I assume that when i configured to point it to "Satellite mail system" is the correct one instead of other things like "Internet.." etc. So the configurations is when you have installed the Postfix and there would pop a lot of questions right? Other than that, what have i missed?
Oh ya, i remember something. Hmm. I do not have any so-called real smtp server so would that be alright? I heard that installed and getting the Postfix running would be enough as it serves as a MTA (mail transfer agent). So if i do not have any smtp server, the relay host= ' ' what should i put it as?
I don't have idea how could I create a script that will forward my email from postfix to a script automatically to sms gateway right now I can receive a mail from solarwinds and I'm done configuring my kannel sms gateway .Could anyway help me how could I send my email-> sms automatically using script?
recently i was raised my question about external and internal emailing using one domain name.Now i have another question about restriction.I can able to set email account and permit only local and external
now my question this kind of setup external and internal one thing i've noticed is that using prinzz1@domain.com(local only) was able to receive email from outside.is it possible to block all outside email if the prinzz1@domain.com is local only?
I've just setup a new Ubuntu 10.04 LTS server on linode for myself. Followed an excellent instruction at: here to finish the installation of some basic stuff including postfix.
I am trying to figure out a way to send an email to my gmail address with an attachment, but cannot find how. Already confirmed that email can reach my gmail account.
In the end I have to use mutt to send the email with attachments, probably SendEmails will also do well, but I am wondering how to do the same thing in postfix from command-line?
I happened to know my incoming and outgoing emails are being monitored by my superior. Just wondered, can i check from the mail header to find out all my emails (incoming/outgoing) are automatically being cc to another email account? We're running mail server using postfix.
I've been trying to send mail to email account even after installing postfix but am not able to do so.My distro is Centos 5.4. I followed the Centos user guide to install and configure postfix into the server,
Code: http://wiki.centos.org/HowTos/postfix but still didn't receive any email.
I have a (virtual) server with 3 NIC's: 1 external (inet), 1 local and 1 DMZ. This server is my gateway. I would like my internal network, where every server has a static 192.168.0.x IP, to access the internet via the gateway. That means the traffic has to pass from the 'local' NIC to the 'external' NIC, connected to the internet. Which setting do I change to accomplish this ?
Please check the sceenshot (attachment) for my current setup
I have a fairly standard home network set-up with a router and a couple machines on the internal network (with private IP addresses 10.0.0.x). One of these machines is running my subversion server, which is in turn used by my laptop. I am now trying to configure my laptop in a way that I can have one working subversion copy connected to the repository which works both when the laptop is connected to my home network as well as if its connecting from internet. I configured a "virtual server" on the router, so that port 443 goes to the machine with subversion, and this works fine. Now I don't know how to configure the laptop to go to the same machine - because the IP is different if I want to access it from outside and from inside. I tried to connect to the external IP of my network, but the router refuses to let the connection go "out and in again". how to get it configured?
I am using Debian linux with wpa_supplicant on the laptop.
i have centos 5.5 and qmail installed in it this qmail is used for internal mail , we are not send mail from internal to external ids i.e gmail, yahoo etc, this qmail intalled on 192.x.x.x ip server this ip is not live ip but my problem is that from few days mail are sending from internal to external like indiatimes ,yahoo
If I try and install, any distro on a ide External hard drive, Will I still get a Bootup Grub installed on my internal Windows MBR. I am thinking the answer is yes.
I'm building a new desktop computer, on which I plan to install Debian Squeeze. I'll have a 1 TB SATA hard drive in the system. I'm also considering using two 500 GB external USB drives, but I'm debating about how I want to use them. Running them all separately for 2 TB of space could be a nightmare, with three potential points of failure, so I was thinking of using the two external drives as a backup system instead.
I'm considering linking the two external drives in a RAID 0 array, then linking that array and the internal drive in a RAID 1 array. I would use mdadm software RAID for all of this so I could use individual partitions in the arrays, avoid hardware dependency, and have greater software control. So now is this feasible to do (having a partial RAID 0+1 setup)? Moreover, what kind of performance could I expect from using potentially slow external drives (one of which I know has a very long spin-up time after idle periods) in a mirroring setup with the internal drive?Would I be far better off using a filesystem backup daemon instead?
EDIT:After some more research and brainstorming, I've decided I might just end up using rsync+cron, lsyncd, or DRBD (assuming it can easily make backups locally). I'd probably have to link up the external drives in RAID 0 (or use some filesystem link trickery). But I suppose such a setup would offer greater control, flexibility in disk capacities (the full system isn't so strictly limited to the capacity of the smallest member of the array), and granularity than RAID 0+1 would.I'm still open to thoughts on the mdadm RAID 0+1 solution, but does anyone have any advice on choosing backup software? For some background on my needs, I'll be using this computer as both an everyday desktop and a personal LAMP server (MySQL database files would be included in the backups).
I am new to fedora 13. My problem is that I can not hear any sound from my laptop's internal speakers (that works f9 in windows--so no h/w probs!) but when I connect external headphones, everything is heard.I have tried several commands from various internet sources since past one week. I don't understand many of the commands that I have run, but that has somehow helped me to run media files and hear sound on HEADPHONES.
Im pretty sure this is trivial to config, but I havent had any luck searching on google.My situation is: I want to forward any emails sent to my domain to another account. So:
I have Installed Virtual Box 3.1.6 on my system. The host is running on SuSe 11.2 and I have installed the SuSe 11.2 as guest OS on the VBox. I have a another system in which I installed Win XP. How to make serial port connection between the VBox and Win XP system.
Im using it in an attempt to backup all of the files off of my dead Windows xp Computer. Right now I am using the 9.10 live disk of Ubuntu and cannot get the program to recognize what kind of file system my internal hard drive is using. (A western digital 320 GB hard drive with partition 1 in NTFS and part2 in FAT32) I would like to be able to back up this drive onto my 1 TB Western Digital external hard drive that is also in ntfs.
Now here comes the wierd part, it won't read or recognize my interal and external hard drives that run those file systems but it will recognize and allow me to read, edit, and access all of the ntfs hard drives on my home network. I did some lurking and tried a tutorial for creating a mount point and on how to force mount a disk, but neither of my disks would show up in Places/Computer. So then I checked the /etc/fstab file and is says,
Which I think means that it says I have no hard drives installed or connected to the computer. Yet when I go into Disk Utility it tells me the disk is there and asks if I want to format the disk into ntfs...
I come from more of a programming background but have been giving the task of sending backup results from a linux box in an email to external email addresses, I have spent days looking trough google for info but cant seem to find anything simple, I have looked at postfix but because I don't understand networks, hosts, nameservers etc. What I need to do to allow mail get sent from the linux box to external mail address. I have outlook connected to an exchange server on windows and I can ping the linux box from my windows command so surely it cant be to much involved.
One of our postfix servers is for sending/receiving internal emails only. When a user entered a wrong recipient address, it will take almost an hour for the user to get the "Recipient address rejected" email. What can be done to let the user get the "Recipient address rejected" email quickier.
I am trying to setup a simple SMTP server to relay scanned documents from a Xerox machine to email addresses. Unfortunately the Xerox machine doesn't support TSL or SSL so sending mail over port 25 on gets blocked. I have setup postfix on a desktop running Fedora 13 and have been able to set it up to forward the mail onto the correct server (gmail for example). My question is, how do I get the server to encrypt the emails (scanned documents) when sending them over the internet?
I have tried adding:
Code: smtpd_use_tls = yes smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key But when I look at the wireshark capture of the sending I can read my test message in plain text.
I have a server with an sms-terminal attached. There I use "gnokii" to send sms. Now I'm searching for a solution with postfix or something else to receive an email and resend the subject of this email as an sms with gnokii. I have already searched a lot. I found that I have to create a special "sms"-user and a .procmail / .forward-file. But I had no success with this solutions.
