How to Install vSMTP on Kali Linux Latest

vSMTP is a secure and reliable Mail Transfer Agent (MTA) that ensures efficient and effective email delivery. If you are looking to install vSMTP on Kali Linux Latest, this tutorial will guide you through the process step-by-step.

Prerequisites

Before you proceed with the installation, ensure you have the following:

• A Kali Linux Latest distribution
• Root or superuser privileges
• A stable internet connection

Installation Steps

To install vSMTP on Kali Linux Latest, follow these steps:

1. Launch a terminal window on your Kali Linux host.
2. Update your package lists and upgrade all existing packages using the following command:

sudo apt-get update && sudo apt-get upgrade

3. Install the necessary dependencies by executing the command below:

sudo apt-get install build-essential libssl-dev libreadline-dev libpq5 libpq-dev libreadline5 libsqlite3-dev libpcap-dev openjdk-11-jdk git-core autoconf postgresql pgadmin3 curl zlib1g-dev libxml2-dev libxslt1-dev libyaml-dev curl zlib1g-dev libffi-dev libtool

4. Clone vSMTP source code from the Github repository using the following command:

git clone https://github.com/viridit/vsmtp.git

5. Change your working directory to the vsmtp directory using the command:

cd vsmtp

6. Compile and install vSMTP by running the following command:

sudo make install

7. Create a vSMTP user and group using the following commands:

sudo groupadd vsmtp
sudo useradd -r -g vsmtp -s /sbin/nologin vsmtp

8. Create a directory for vSMTP configuration files using the command below:

sudo mkdir /etc/vsmtp

9. Create a vSMTP configuration file using the following command:

sudo vim /etc/vsmtp/main.cf

10. Configure vSMTP using the following sample configuration:

daemon=yes
pid=/run/vsmtp.pid
smtpd_banner=$myhostname ESMTP $mail_version
smtpd_tls_cert_file=/etc/vsmtp/postfix.cert.pem
smtpd_tls_key_file=/etc/vsmtp/postfix.key.pem
smtpd_tls_security_level=may
smtpd_recipient_restrictions=
permit_mynetworks, reject_unauth_destination
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_tls_security_level=may
smtp_tls_CApath=/etc/vsmtp/certs

alias_maps = hash:/etc/vsmtp/aliases
alias_database = hash:/etc/vsmtp/aliases
myhostname = your hostname
mydomain = your domain name
myorigin = $myhostname
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.0.0/16
mailbox_size_limit = 0
defer_transports =
inet_interfaces = all
inet_protocols = ipv4, ipv6
local_recipient_maps =
virtual_alias_domains =
virtual_alias_maps = proxy:ldap:config:ldap_aliases.cf
relayhost = smtp.example.com:port
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noanonymous
smtpd_client_connection_count_limit = 10
smtpd_delay_reject = yes
smtpd_end_of_data_restrictions =
smtpd_enforce_tls = yes
smtpd_helo_required = yes
smtpd_helo_restrictions =
permit_mynetworks, warn_if_reject reject_non_fqdn_hostname, reject_invalid_hostname, permit
smtpd_sender_restrictions =
reject_non_fqdn_sender,reject_unknown_sender_domain,permit_mynetworks,reject_non_fqdn_recipient,reject_unknown_recipient_domain,reject_unauth_destination,permit
unknown_local_recipient_reject_code = 550

11. Set vSMTP configuration ownership to vsmtp user and group using the commands below:

sudo chown -R vsmtp:vsmtp /etc/vsmtp
sudo chmod -R 755 /etc/vsmtp

12. Start vSMTP service and enable it to start at boot time using the following commands:

sudo systemctl start vsmtp
sudo systemctl enable vsmtp

13. Verify vSMTP installation and status by running the following commands:

sudo systemctl status vsmtp
vsmtpctl status

Congratulations! You have successfully installed vSMTP on Kali Linux Latest. You can now configure vSMTP to start relaying your trusted outbound email.

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