How To Set Up An Email Server With Postfix And Dovecot Without MySQL On Debian 7
Cherrie Patete
Today i created a mail server with this tutorial : -mail-avec-postfix-dovecot-et-mysql/I can send mails (detected as spam, but it works), but if i send me an email from my gmail adress, it won't work...
how to set up an email server with postfix and dovecot without MySQL on Debian 7
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So basically, how would I setup what I wrote in the last paragraph without losing existing data? I don't have much received emails on the server, but losing data is bad practice and preventing it is always nice.
The tutorial looks amazing on first glance. Great job. Thank you for the effort in creating it and sharing it. However, how do you get around the issue with hosting an email server from a residential IP address?
If it runs and listens OK, but there is still no authentication through dovecot/postfix using this set by you mysql account and database, then try connecting with the same credentials over the commandline in the terminal window:
Dovecot is a POP3 and IMAP server, which provides email clients with access to emails on the server. It also acts as the Local Delivery Agent (LDA), which takes email from Postfix (or other MTA / mail server software) and stores them.
Configure the Postfix email server to check each email with a score > 5.0, mark it as SPAM, and send it directly to the junk folder. Add or adjust the following lines inside /etc/spamassassin/local.cf to setup your anti-spam rules:
I found this in the log, which is what happens when I send a email from my gmail to my mailserver. I'm not quite sure how to interpret it. It seemed as I had followed another guide using virtual alias it redirects the email. Not sure though. Found the old /etc/postfix/virtual file and removed the alias posted in it. saved it and updated postmap and restarted the service. But same error in log.
My email server has been under constant brute force attack for a while now, without success.Recently, however, these bots or automated scripts have found a way to "use my own static IP" in an attempt to break into the email server.
The database, as outlined in the tutorial, handles the forwarding and actual mail user accounts. These accounts are working also, having sent an email to non-forwarding email accounts held on the server. These are received without a problem.
By using Virtual domains and users, we are able to set up unlimited email accounts without creating a system user. This does not make sense if you have only one user on your mail server, but can become pretty handy if you start hosting quite a fair amount of email accounts/domains.
In previous articles, we discussed how to set up your own mail server on Ubuntu from scratch. In part 1 and part 2 of this tutorial series, we learned how to set up Postfix SMTP server and Dovecot IMAP server, but so far we can only have email addresses for users with local Unix accounts. This tutorial is going to show you how to create virtual mailboxes on Ubuntu mail server with PostfixAdmin, which is an open-source web-based interface to configure and manage a Postfix-based email server for many domains and users.
You should now be able to connect to your own email server and also send and receive emails with your desktop email client! Note that you cannot use local Unix accounts to login now. You must log in with the virtual user created from PostfixAdmin web interface.
postfixadmin messed up with my existing environment i set up days ago. i already installed lnmp stack, after installing postfixadmin(apt install postfixadmin), mysql server could not start, and mariadb, php7.4, apache2 was installed by postfixadmin
now i want to relay all mails for my domain to another mail-server.
so if i send an e-mail from [email protected] postfix should not look if the user is existing and give the e-mail to for example smtp.office365.com.
You can see where it is performing the lookup without the domain component and as a result it fails. After adding the account manually, you can see in the same debug log where the lookup is performed using the full email address and passes successfully.
I am on Ubuntu 22.04.1 and followed all the steps from part 1 and 2 into 3. from google searches libssl 1.1.1 has been replaced by 3 (I may be wrong). at the end of part 2 everything worked, I could send and receive emails, but not since the virtual mailbox (Part 3) setup.
I have used mysql with nginx on Ubuntu 22.04.1.
Postfix is a free and widely used open-source mail transfer agent. It supports MySQL, PostgreSQL, and SQLite as the database server to store and manage the virtual domains.
PostfixAdmin is a free web-based interface to manage a postfix mail server. With this tool, we can easily add/remove/edit domain names, email accounts, email quotas, email forwarding, etc.
Now, let us get to the mail configuration file: /etc/dovecot/conf.d/10-mail.conf This file manages the way Dovecot interacts with the server file system to store and extract mail. Find the following commands and uncomment them.
The server will accept plain text or encrypted SMTP and POP/IMAP connections at the standard ports, but will not allow user authentication without encryption. It will pass through a minimal set of mail headers for mail sent by local users, removing identifying information from the original sender's mail software.
This post is written assuming the use of Amazon Web Services to host a virtual mail server, but in theory any hosting service can be used. Very little of the material here is concerned with Amazon-specific issues. So if you are working with another service, just skip over the AWS-specific instructions and perform the equivalent operations in the service that you have chosen to use. Note, however, that not all hosting services are equal when it comes to how email providers view mail coming from your server. For example, it is pointless to even try hosting any significant mail service at Digital Ocean: their IP ranges are blacklisted by many services, and you will have no leverage with any of the parties involved when it comes to trying to ensure delivery.
The following are a set of fairly trivial instructions that set monit to watch over the important server processes, but without issuing notifications or doing much more than restarting on failure. Note that the Amavis configuration specifies a fairly infrequent check, as it is possible to get into a situation with Amavis where it refuses connections because you're sending mail too rapidly and it hits the server's maximum number of concurrent connections per process (which is set at a low 128 for Ubuntu). Having Monit then restart Amavis at that point just makes things worse, boosting load and slowing things down. Mail will be queued and reattempted for any period while Amavis is truly down and waiting on Monit to restart it.
If you want a quiet life free from worries about whether your mail is going to be delivered to its destination, then you should take the small amount of additional time to set up SPF and DKIM for your mail server. These modifications go a long way towards ensuring that you won't have issues with triggering false positives from spam filters. It is becoming ever harder these days to ensure that your mail reaches its recipients. Set up a mail server in the cloud that happens to use an IP address that was at some time in the past used by spammers, or engage in a serious discussion of subjects that see a lot of spam, and you can wave goodbye to the certainty of delivery of your mail to addresses at Gmail or other similar email providers. These entities maintain their own arcane anti-spam infrastructures, inscrutable and distinct from the open world of IP address blacklists. Resolving issues or even simply attracting the attention of anyone who might help is essentially impossible if you don't happen to run a large company.Thus everyone who builds their own mail server should set up the two simple frameworks that email providers pay attention to when it comes to the decision tree for their anti-spam automation: Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM).
Of course being on AWS - or indeed any sort of easily available hosting in the US wherein the server is not in your front room - means that the US government has free access to your data any time they particularly feel up to the task, and you may never know a copy was taken. One of the welcome forthcoming evolutions in virtual hosting services will be some form of turn-key encrypted server operations such that you can have the convenience of an AWS-style service but without the transparency it affords the present day panopticon-in-the-making.
Further, it is apparently the case that all email traffic between mail servers is being recorded by various governmental agencies. Unfortunately the present state of SMTP in the wild is that many or most mail servers do not implement the ability to pass emails over an encrypted connection: so while it's easy to setup and enforce encryption for POP, IMAP, and webmail connections between users and the mail server, email traffic between mail servers is often plain text. Forcing your server to only use encrypted connections with other servers will mean that a large fraction of your email traffic in both directions will be rejected. Thus the configuration provided for Postfix in this post is for optional encryption - emails sent and received will be encrypted if the mail server on the other end of the connection can support it.
Open postfixadmin-2.1.0/DATABASE_MYSQL.TXT with your favorite editor such as vim, nano or gedit and comment out or remove all lines under section "Postfix / MySQL", since we have created our own use for the mail server. The section is currently lines 26 to 39.
You will also need to change the password_query to the commented one in /etc/dovecot/dovecot-sql.conf. If you are running Dovecot release candidate 28 or older, the server will not send out the list of accepted CA names, which could make clients with multiple client certificates unable to connect. Please upgrade or install this patch.
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