{"id":4793,"date":"2014-10-13T13:43:11","date_gmt":"2014-10-13T18:43:11","guid":{"rendered":"https:\/\/secure.rosehosting.com\/blog\/?p=4793"},"modified":"2022-12-19T07:02:45","modified_gmt":"2022-12-19T13:02:45","slug":"setup-a-mailserver-with-exim-and-dovecot-on-a-centos-7-vps","status":"publish","type":"post","link":"https:\/\/www.rosehosting.com\/blog\/setup-a-mailserver-with-exim-and-dovecot-on-a-centos-7-vps\/","title":{"rendered":"Setup a mailserver with Exim and Dovecot on a CentOS 7"},"content":{"rendered":"
<\/div>

\"eximThe following article will guide you through the steps of installing and setting up a mailserver using Exim and Dovecot on a CentOS 7 VPS<\/a><\/strong>.<\/p>\n

For this tutorial, we are using one of our CentOS-based managed VPS hosting<\/a> plans, pre-installed with minimal CentOS 7 OS.<\/p>\n

What is Exim?<\/strong><\/p>\n

Exim is a mail transfer agent (MTA) used on Unix-like operating systems. Exim is free software<\/strong> distributed under the terms of the GNU General Public License, and it aims to be a general and flexible mailer with extensive facilities for checking incoming e-mail.<\/p>\n

What is Dovecot?<\/strong><\/p>\n

Dovecot is an open source IMAP and POP3<\/a> email server<\/strong> for Linux\/UNIX-like systems, written with security primarily in mind. Dovecot is an excellent choice for both small and large installations.<\/p>\n

<\/p>\n

 <\/p>\n

UPDATE THE SYSTEM<\/b><\/h4>\n

First off, ssh<\/code> to your server and initiate a screen<\/code> session using the command below:<\/p>\n

## screen -U -S exim-dovecot<\/pre>\n
once you’re in a screen<\/code> session, update your CentOS 7 VPS using yum<\/code> as in:<\/p>\n
## yum update<\/pre>\n
 <\/p>\n
ENABLE EPEL REPOSITORY<\/b><\/h4>\n
Enable EPEL repository on the CentOS system using:<\/p>\n
## yum install http:\/\/dl.fedoraproject.org\/pub\/epel\/7\/x86_64\/e\/epel-release-7-2.noarch.rpm<\/pre>\n
if you get a 404 not found, go at https:\/\/dl.fedoraproject.org\/pub\/epel\/7\/x86_64\/Packages\/e\/<\/a> and install the latest epel-release<\/code> rpm package available.<\/p>\n
check if EPEL has been enabled on your system using:<\/p>\n
## yum repolist<\/pre>\n
once EPEL is enabled, install some useful tools using:<\/p>\n
## yum install file perl-Mail-SPF.noarch openssl vim<\/pre>\n
 <\/p>\n
GENERATE SSL CERTIFICATE<\/b><\/h4>\n
Since we are going to use SSL in Dovecot and Exim, we need to have an SSL certificate. You can purchase and use one of our GeoTrust SSL Certificates<\/a> or you can create your own self-signed SSL certificate for mail.mydomain.com<\/code> using the commands below:<\/p>\n
## mkdir \/root\/SSL\/mail.mydomain.com -p\r\n## cd \/root\/SSL\/mail.mydomain.com\r\n## openssl req -nodes -x509 -newkey rsa:2048 -keyout mail.mydomain.com.key -out mail.mydomain.com.crt -days 365<\/pre>\n
Move the SSL certificate and key to \/etc\/ssl<\/code> using:<\/p>\n
## cp mail.mydomain.com.key mail.mydomain.com.crt \/etc\/ssl\/<\/pre>\n
 <\/p>\n
INSTALL AND CONFIGURE EXIM<\/b><\/h4>\n
Install exim<\/strong> on the CentOS 7 virtual server using yum<\/code>:<\/p>\n
## yum install exim<\/pre>\n
next, open \/etc\/exim\/exim.conf<\/code> with your favorite editor and configure exim<\/strong> as follows:<\/p>\n
## cp \/etc\/exim\/exim.conf{,.orig}\r\n## vim \/etc\/exim\/exim.conf\r\n\r\nprimary_hostname = mail.mydomain.com\r\ndomainlist local_domains = @ : mydomain.com\r\n\r\ntls_advertise_hosts = *\r\ntls_certificate = \/etc\/ssl\/mail.mydomain.com.crt\r\ntls_privatekey = \/etc\/ssl\/mail.mydomain.com.key\r\n\r\nauth_advertise_hosts = *\r\n<\/pre>\n
find the transport section and edit the following:<\/p>\n
local_delivery:\r\n  driver = appendfile\r\n  directory = $home\/Maildir\r\n  maildir_format\r\n  maildir_use_size_file\r\n  delivery_date_add\r\n  envelope_to_add\r\n  return_path_add<\/pre>\n
scroll down the the authenticators section and add the following lines:<\/p>\n
dovecot_login:\r\n  driver = dovecot\r\n  public_name = LOGIN\r\n  server_socket = \/var\/run\/dovecot\/auth-client\r\n  server_set_id = $auth1\r\n\r\ndovecot_plain:\r\n  driver = dovecot\r\n  public_name = PLAIN\r\n  server_socket = \/var\/run\/dovecot\/auth-client\r\n  server_set_id = $auth1<\/pre>\n
Start the EXIM MTA and add it to system’s startup using systemctl<\/code><\/p>\n
## systemctl start exim\r\n## systemctl status exim\r\n## systemctl enable exim<\/pre>\n
 <\/p>\n
INSTALL AND CONFIGURE DOVECOT<\/b><\/h4>\n
Install Dovecot<\/strong> on the system using yum<\/code><\/p>\n
## yum install dovecot<\/pre>\n
Once installed, configure SSL in Dovecot<\/strong> by editing the following:<\/p>\n
## vim \/etc\/dovecot\/conf.d\/10-ssl.conf\r\n\r\nssl = yes\r\nssl_cert = <\/etc\/ssl\/mail.mydomain.com.crt\r\nssl_key = <\/etc\/ssl\/mail.mydomain.com.key<\/pre>\n
next, allow plaintext authentication<\/strong> in \/etc\/dovecot\/conf.d\/10-auth.conf<\/code>:<\/p>\n
## vim \/etc\/dovecot\/conf.d\/10-auth.conf\r\n\r\ndisable_plaintext_auth = no\r\nauth_mechanisms = plain login<\/pre>\n
configure mailbox location<\/strong> and type in \/etc\/dovecot\/conf.d\/10-mail.conf<\/code>:<\/p>\n
## vim \/etc\/dovecot\/conf.d\/10-mail.conf\r\n\r\nmail_location = maildir:~\/Maildir<\/pre>\n
Set-up Dovecot so that is allows Exim to use its authentication system in \/etc\/dovecot\/conf.d\/10-master.conf<\/code><\/p>\n
## vim \/etc\/dovecot\/conf.d\/10-master.conf\r\n\r\nservice auth {\r\n...\r\n    unix_listener auth-client {\r\n        mode = 0660\r\n        user = exim\r\n    }\r\n}<\/pre>\n
Start Dovecot and add it to system’s start-up using:<\/p>\n
## systemctl start dovecot\r\n## systemctl status dovecot\r\n## systemctl enable dovecot<\/pre>\n
 <\/p>\n
CREATE SYSTEM USER<\/b><\/h4>\n
## useradd -m test\r\n## passwd test<\/pre>\n
 <\/p>\n
CONFIGURE YOUR EMAIL CLIENT<\/b><\/h4>\n
In this example, we are using Mozilla Thunderbird as email client to send\/receive emails. To configure the newly created email account, open Thunderbird enter your account details as shown in the pictures below:<\/p>\n
\"step-1\"<\/p>\n
Enter your name, your email address and your password and click ‘Continue’.<\/p>\n
\"step-2\"<\/p>\n
Configure your mail server parameters and click ‘Done’. That’s it.<\/p>\n
 <\/p>\n
LET US DO THIS FOR YOU?<\/b><\/h4>\n
Of course you don\u2019t have to do any of this if you use one of our Linux VPS Hosting<\/a> services, in which case you can simply ask our expert Linux admins to install a mailserver with Exim and Dovecot<\/strong>. They are available 24×7 and will take care of your request immediately.<\/p>\n
PS<\/span>.<\/strong> If you liked this post please share it with your friends on the social networks using the buttons on the left or simply leave a reply below. Thanks.<\/p>\n","protected":false},"excerpt":{"rendered":"
The following article will guide you through the steps of installing and setting up a mailserver using Exim and Dovecot … <\/p>\n
Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":3931,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1699,1706,13],"tags":[34,71,487,334],"yoast_head":"\nSetup a mailserver with Exim and Dovecot on a CentOS 7 - RoseHosting<\/title>\n<meta name=\"description\" content=\"Setup a mailserver with Exim and Dovecot on a CentOS 7 - RoseHosting\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rosehosting.com\/blog\/setup-a-mailserver-with-exim-and-dovecot-on-a-centos-7-vps\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Setup a mailserver with Exim and Dovecot on a CentOS 7 - RoseHosting\" \/>\n<meta property=\"og:description\" content=\"Setup a mailserver with Exim and Dovecot on a CentOS 7 - 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