Mail Server Settings

Configure Exim SMTP Server

This page will help you to configure the EXIM email server.

Exim Mail  Server -> Mail server Settings

Eenos use exim and the internet mail server. You can customize the exim mail server. 

We recommend to read the exim  documentation and understand the parameters before making changes to the exim mail server.

Basic Settings

This section contain the  basic exim configuration.  You can make some of the following changes

• Dictionary Attack Protection : Block dictionary attacks by dropping more than 4 connections
• Reject Mail Send to Server Hostname : Reject email send to servers host name user@hostname
• SpamAssassin ™ for secondary MX domains : Enable SpamAssassin for secondary MX domains
• Limit Suspicious SMTP Connection : Rate Limit Attacking SMTP server connections.
• Rate Limit Incoming SMTP Failed Recipients : Rate limit if the recipient is failed 5 time on last on hour.
• Require HELO or EHLO Before Mail : Best practice to request HELO before mail.
  
• Deny Hostname or Local IP HELO : If the HELO match primary hostname or sever IP deny it.
• Deny Local Domain HELO : If the HELO match local domain deny it.
• Require RFC Compliant HELO : Force SMTP Connections to use (RFC2821 4.1.1.1
• SPF Verification : Check for Sender Policy Framework to avoid spamming.
• DKIM Verification : Enable DKIM verification with a warning
• Reject DKIM Failure : Reject messages with DKIM verification failure
• IPv6 Support : Allow exim to work on Ipv6 connections

Advanced Settings

This section contain some additional settings for the exim mail server.

• Exim on Another Port :  The exim default listening ports are 25,465,587. Please add here via comma separated lists
• Rate Limit By Spam Score :  Rate limit hosts with above this spam score
• Maximum Recipients Soft Limit : Reject any recipient after this number in a single message RCPT
• Maximum Recipients Hard Limit : Disconnect any recipient after this number in a single message RCPT
• System Filters : The common exim filter for the entire server
• Log Sender Rates : Log the sender email rates will help you to track spam
• Sender Verification : Verify the sender is real or not before accepting emails
• Sender Verification by Call Outs : Call out 60 seconds to verify the sender is real or not before accepting emails
• Set SMTP Sender Header : Force to use -f flag to sending email will help to track the original sender
• Deliver Mail if Scanner Fail : Deliver emails if the spam scanner fails
• Send Mail From Dedicated Ips : Let the domain send emails from their own IPs

RBL DNS Blacklist

This section will help you to configure a DNS blacklist server to control  spammers. 

RBL Block Lists

You can enabled  or disable a  specific RBL server .  To  manage the RBL server click the button Manage More RBL Lists

 Security Settings

This section will manage the exim security related configurations.

• Use Virus Scanner : Enable ClamAV if available.
• Scan Authenticated Mails : Scan emails from authenticated senders using ClamAV
• Scan Outgoing Mails :  Scan all outgoing emails using ClamAV
• Require SSL Connection : Only allow client connection over ssl use STARTSSL
• SSL / TLS Options : The Openssl connection options.
• SSL Cipher Suites

After making the changes click the button Save Settings.