Mail
Posted by Matthew Jeffels, Last modified by Matthew Jeffels on 03 October 2016 06:01 PM

Mail

This section will cover the options available to you under the Mail tab of the Exim Basic Editor. 

The Options available to you are as follows. 

Mail Options

Log sender rates in the exim mainlog. This can be helpful for tracking problems and/or spammers.

This setting allows you to log sender rates in the Exim mail log.

Sender Verification Callouts

This setting allows Exim to connect to the mail exchanger in order to check whether the address exists before Exim accepts the message. 

Smarthost support

This setting allows you to use a smart host for outgoing messages. In order to configure this you need to enter a valid route_list value in the textbox. 

  • To configure a smart host that uses a single IP address, enter an asterisk (*) followed by an IPv4 or IPv6 address. For example:

    * 192.168.0.1
    * "</ 2001:0db8:85a3:0042:1000:8a2e:0370:7334"
  • To configure a smart host that uses multiple IP addresses, enter an asterisk, followed by the IP addresses. For example:

    * 192.188.0.20:192.188.0.21:192.188.0.22
    * "</ [2001:0db8:85a3:0042:1000:8a2e:0370:7334]:1225 / [::1]:1226 / 192.168.0.1"
  • To configure a smart host that uses only specific domains from the hosts that you enter, replace the asterisk with the desired domain name. Separate entries for multiple domain names with a semicolon (;). For example:

    example.com 192.188.0.20:192.188.0.21:192.188.0.22; exampletwo.com 192.168.0.1
    example.com "</ [2001:0db8:85a3:0042:1000:8a2e:0370:7334]:1225 / [::1]:1226 / 192.168.0.1"; exampletwo.com "</ 2001:0db8:85a3:0042:1000:8a2e:0370:7334"

Mail Options

EXPERIMENTAL: Rewrite From: header to match actual sender

This setting allows the system to rewrite the From header in emails to show the original identity of the actual sender for a message sent to your server.

Send generic recipient failure messages

This setting allows you to send the following generic message to senders who attempt to send an undeliverable message;

"The recipient cannot be verified. Please check all recipients of this message to verify they are valid."

Allow mail delivery if malware scanner fails

This setting allows the server to deliver mail to the recipient should the malware scanner fail. If this is off mail wont be delivered till the malware scanner is repaired.

Mail Options

Sender Verification

This setting if enabled allows you to verify the origin of mail senders.

Set SMTP Sender: headers

This setting allows you to set the Sender: header as -f flag passed to sendmail when a mail sender changes. If this is set to off, Microsoft Outlook will not add an on behalf of header.

Allow mail delivery if spam scanner fails

This setting allows the server to deliver mail to the recipient should the spam scanner fail. If this is off mail wont be delivered till the spam scanner is repaired.

Mail Options

Enable Sender Rewriting Scheme (SRS) Support

This setting if enabled will rewrite the sender address so that email appears to come from a forwarding server. This allows the forwarded mail to pass an SPF check.  

Query Apache server status to determine the sender of email sent from processes running as nobody

This setting allows the server to determine the sender of a message when the "nobody" user sends a message. This requires more resources to perform but is more secure. An alternative faster method is to Trust X-PHP-Script headers.

Trust X-PHP-Script headers to determine the sender of email sent from processes running as nobody

This setting allows Exim to trust messages that the nobody user sends with X-PHP-Script headers. In addition this setting also enables the mail server to determine the true sender of the messages. This is a faster delivery process than a query to the Apache server to determine the sender which is performed in the above option.

Thanks

Matt Jeffels
PAC Web Hosting

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