KitsNet Operations:Services:Mail:Legacy VM Based

There are two KVM guests deployed to implement Mail services in KitsNet:

• mailgw is the email gateway based on the eFa Project and hosts the external facing SMTP service that receives and sends email. This system also implements stringent anti-spam protections.
  • MailWatch supports logins for end-users as well as administrative logins
  • Webmin supports certain administrative functions against the server itself. The installation is set to use Webmin-internal authentication and only one user is currently defined - see /etc/webmin/miniserv.users
• mailroom hosts the individual mailboxes assigned to KitsNet users, accessible through IMAP and web from anywhere in the world. Virtual user and mailbox management is hosts on this system.
  • Dovecot is used to present the IMAP mailboxes to all clients
  • SquirrelMailis used to deploy a webmail service for KitsNet users internal and external to the site
  • postfix.admin is deployed to support administrative access and end user access to mailbox maintenance functions including password reset.

I updated the default postfix configuration (main.cf) on mailroom 9/28/2022:

#
# Resource limits added 20220928
# message_size_limit 10240000 (D), set value 10x
# mailbox_size_limit 51200000 (D), set value 10x
# virtual_mailbox_limit 51200000 (D), set value 10x
#
message_size_limit =    102400000
mailbox_size_limit =    512000000
virtual_mailbox_limit = 512000000