Is there an easy way to do this? Maybe nullmailer is for you. Check that your server is open to the world in port 25 outgoing only.
And the dns is configured correctly. You are not suppose to do anything to sendmail for sending outgoing mails. Here are some details on how to setup sendmail for Outgoing Only.
Configure Postfix to Send Mail Using an External SMTP Server
Also on this page. I would run dpkg-reconfigure postfix and select the "internet site" or "internet site with smarthost" if you want to send the mail through a smarthost option as a starting point. This will enable you to send mail to and receive mail from the internet.
If you don't want the box to be able to receive mail then I would suggest configuring the SMTP server to listen on localhost only. Sign up to join this community.
The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Minimal setup for sendmail to send outgoing email only? Ask Question. Asked 9 years, 10 months ago. Active 4 years, 4 months ago. Viewed 10k times. Michael Michael 1 1 gold badge 2 2 silver badges 8 8 bronze badges. Active Oldest Votes. You should also pay attention if you need a relay host and define it DSmy. Xavier Maillard Xavier Maillard 2 2 silver badges 4 4 bronze badges.
Marian Marian 1 1 silver badge 4 4 bronze badges.This article explains how you can send email from devices and business applications when all of your mailboxes are in Office For example:. You have a line-of-business LOB application that manages appointments, and you want to email reminders to clients of their appointment time. You will need to upgrade or update all of your devices and applications to use the new TLS version and ciphers. This option supports most usage scenarios and it's the easiest to set up.
Choose this option when:.
Enter the following settings directly on your device or in the application as their guide instructs it might use different terminology than this article. As long as your scenario meets the requirements for SMTP AUTH client submission, the following settings will enable you to send email from your device or application.
Determine what version of TLS your device supports by checking the device guide or with the vendor. If your device or application does not support TLS 1. Use an on-premises Exchange server or another SMTP email server if your device is unable to meet the previous requirements for connecting to Office In fact, you might find it easier to manage multiple devices and applications that send email messages in an on-premises Exchange server instead of connecting them all to Office directly.
The Exchange server would relay messages in the same way that a device would use Office to relay messages using Option 3 below.
You can find out more about configuring your own email server to send emails to Office here: Set up connectors to route mail between Office and your own email servers. This method bypasses most spam checks for email sent to people in your organization. This can help protect your company IP addresses from being blocked by a spam list.
With this method, you can send email from any location or IP address, including your on-premises organization's network, or a third-party cloud hosting service, like Microsoft Azure.
Authentication : You must be able to configure a user name and password to send email on the device. Note that you cannot use Microsoft Security Defaultswhich disable basic authentication and are designed to protect your users from compromise. If at all possble, we recommend using Option 2 or 3 below.
Port : Port recommended or port 25 is required and must be unblocked on your network. Some network firewalls or ISPs block ports, especially port You can only send from one email address unless your device can store login credentials for multiple Office mailboxes.
Office imposes a limit of 30 messages sent per minute, and a limit of 10, recipients per day. SMTP client submission Option 1 is not compatible with your business needs or with your device. You only need to send messages to recipients in your own organization who have mailboxes in Office ; you don't need to send email to people outside of your organization. You want your device or application to send from each user's email address and do not want each user's mailbox credentials configured to use SMTP client submission.
Direct send allows each user in your organization to send email using their own address. Avoid using a single mailbox with Send As permissions for all your users. This method is not supported because of complexity and potential issues. You want to send bulk email or newsletters.I tried this comments on my Zubuntu Koha 3. Many thanks. Dear Vimal, I installed postfix for koha emails.
After every command on terminal screen, the system display "You Have New Message". Is it a problem? I think its possible to manage postfix and gmail from VPS. All the best. I am not sure about the reason of message. May I know, Koha send email notices?
Sir I am Install Configure gmail with postfix but to not install the following error. Reading package lists Done Building dependency tree Reading state information Done Package postfix is not available, but is referred to by another package. Dear Sir, I am an avid follower of your blog and I find it very useful because we are also using Koha.
I have installed Koha on our local server, and it worked fine except the email notices. I have installed and configured the postfix and email notices triggers using the above procedures. However, Koha sent notices says the email status is 'sent' but when I checked my email I have received nothing from Koha Can u help on this issue?
Thank u very much in advance! Sir can you please help me in setting up cron jobs to send overdue notices and advance notices. Without having to do it manually. Problems with dovecot are not easy to fix. See here for mark email threads. Configure gmail with postfix to send notices from Koha. Installation of postfix mail server.
Open a terminal and apply the following commands one by one. Select no configuration in the post installation screen.
See documentation for details. You want something like this: postfix slow transport. You can set those options for the default transport smtp if you really want it to be for everything. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.
Asked 10 years, 7 months ago. Active 10 years, 5 months ago. Viewed 11k times. Maybe a postfix newbie question. Jonathan Hendler Jonathan Hendler 1 1 gold badge 4 4 silver badges 10 10 bronze badges. Active Oldest Votes. Bill Weiss Bill Weiss 9, 2 2 gold badges 34 34 silver badges 63 63 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
The Overflow Blog. Featured on Meta. Community and Moderator guidelines for escalating issues via new response….How To Install and Configure Postfix as a Send-Only SMTP Server on Debian 9
Many open source mailing lists including all the Ubuntu mailing lists use Mailman as their mailing list software. It is powerful and easy to install and maintain. Mailman provides a web interface for the administrators and users, using an external mail server to send and receive emails.
It works perfectly with the following mail servers:. We will see how to install and configure Mailman with, the Apache web server, and either the Postfix or Exim mail server. If you wish to install Mailman with a different mail server, please refer to the references section. In Ubuntu, by default, the exim4 configuration files are split across different files.
It creates list linux user. It creates the list linux group.
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The mailman process will be owned by this user. This section assumes you have successfully installed mailman, apache2, and postfix or exim4. Now you just need to configure them. This will setup a new Apache VirtualHost for the Mailman administration site. Now enable the new configuration and restart Apache:. Mailman uses apache2 to render its CGI scripts. For Postfix integration, we will associate the domain lists. Please replace lists.
Associate the domain lists. Once Exim4 is installed, you can start the Exim server using the following command from a terminal prompt:. In order to make mailman work with Exim4, you need to configure Exim4. As mentioned earlier, by default, Exim4 uses multiple configuration files of different types. For details, please refer to the Exim web site. To run mailman, we should add new a configuration file to the following configuration types:.
Exim creates a master configuration file by sorting all these mini configuration files. So, the order of these configuration files is very important. The order of main and transport configuration files can be in any order. But, the order of router configuration files must be the same. These two configuration files contain same type of information. The first file takes the precedence.
For more details, please refer to the references section. Once mailman is installed, you should create the default mailing list. Run the following command to create the mailing list:. We have configured either Postfix or Exim4 to recognize all emails from mailman.
If you have made any changes to the configuration files, please ensure that you restart those services before continuing to next section. The Exim4 does not use the above aliases to forward mails to Mailman, as it uses a discover approach.First, I have to admit that sometimes, the inner workings of Postfix are voodoo to me.
However, after trudging through Postfix mailing list archives and experimenting a bit, this is how I understand it.
Postfix is highly efficient, and pretty smart in its default configuration. It tries to deliver as much of your outbound mail as possible as quickly as possible. But with a stubborn MTA like Yahoo and sometimes Hotmailyou need to force Postfix to slow down its uber-efficient approach.
So, using transport maps, you can tell Postfix to watch out for emails to specific domains like Yahoo and treat them a bit differently. The first step is to determine which domains you want to treat differently. The email domain goes on the left, and the name of your custom transport goes on the right always followed by a colon.
However, listing all those domains forces you to stay up to date with any new domains that Yahoo might launch.
Configure postfix for mass mailing - need 400.000 mails per hour
First, put ymail. Then add the following lines at the bottom:. The third step of the process is to create some custom settings in your main. This is where the Postfix voodoo kicks in for me, so feel free to experiment with these settings and tweak to your liking. The above settings that happen to work for my needs, but I still tweak them to experiment, and if you have a configuration that works well with Yahoo or if you have other custom transports that help increase deliveryplease feel free to share them in the comments.
Finally, do a tail -f on your maillog. These are the messages that are being diverted through your new transport!Get the latest tutorials on SysAdmin and open source topics. Write for DigitalOcean You get paid, we donate to tech non-profits. DigitalOcean Meetups Find and meet other developers in your city. Become an author. In this tutorial, we will install and configure Postfix so that it can be used to send emails by local applications only — that is, those installed on the same server that Postfix is installed on.
However, if you manage a cloud server on which you have installed applications that need to send email notifications, running a local, send-only SMTP server is a good alternative to using a 3rd party email service provider or running a full-blown SMTP server.
Note: If your use case is to receive notifications from your server at a single address, emails being marked as spam is not a significant issue, since you can whitelist them. The most efficient way to install Postfix and other programs needed for testing email is to install the mailutils package by typing:. Installing mailtuils will also cause Postfix to be installed, as well as a few other programs needed for Postfix to function. After typing that command, you will be presented with output that reads something like:.
Near the end of the installation process, you will be presented with a window that looks exactly like the one in the image below. The default option is Internet Site. The System mail name should be the same as the name you assigned to the Droplet when you were creating it. If it shows a subdomain like mars. For that to happen, Postfix needs to be configured to listen only on the loopback interfacethe virtual network interface that the server uses to communicate internally.
To make the change, open the main Postfix configuration file using the nano editor. In place of loopback-only you may also use localhostso that the modified section may also read:. After that, restart Postfix by typing:. In performing your own test syou may use the body and subject line text as-is, or change them to your liking. However, in place of user example. Note: With this configuration, the address in the From field for the test emails you send will be sammy example. If you change your username, the From address will also change.
The full content of the file on a default installation of Ubuntu With that setting, system generated emails are sent to the root user. What you want to do is edit it so that those emails are rerouted to your email address.