Registry configuration

ExchangeMode

N/A

N/A

N/A

This value is set when Email Gateway Security is installed in Exchange plugin mode. For details see Integrations/Onsite Microsoft Exchange deployment.

Do not change this value manually!

InstallationFolder

C:\Program Files\OPSWAT\MetaDefender Email Security\

string

N/A

This value is by the Email Gateway Security installation.

Do not change this value manually!

external_quarantine_block

dword

optional

Enable quarantining the original copy of blocked emails on an other mail server. For details see Configuration/Quarantine configuration.

If the parameter does not exist or if it is 0, then the internal quarantine will be used in case of blocked emails.

external_quarantine_sanitize

dword

optional

Enable quarantining the original copy of sanitized emails on an other mail server. For details see Configuration/Quarantine configuration.

If the parameter does not exist or if it is 0, then the internal quarantine will be used in case of sanitized emails.

sender_helo_domain

string

optional

The fully qualified domain name (FQDN) that Email Gateway Security will send in HELO/EHLO commands to relay SMTP servers. Besides this FQDN the external IP address of Email Security will also be sent. For details see section Opening and closing in RFC 821.

If the parameter does not exist or if it is empty then the computer name of Email Gateway Security is sent in HELO/EHLO.

receiver_helo_domain

string

optional

The fully qualified domain name (FQDN) that Email Gateway Security will send in HELO/EHLO commands to SMTP clients. For details see section Opening and closing in RFC 821.

If the parameter does not exist or if it is empty then the computer name of Email Gateway Security is sent in the response to a HELO/EHLO.

exchange_exclude_probe_emails

dword

optional

Microsoft Exchange Server sends probe email messages to monitor the health status of the email processing components. This probe messages can, however, fill Operating/Email History. Setting this parameter to 0 will enable listing Exchange probe messages in Audit > Email History.

If the parameter does not exist or if it is 1, then Exchange probe messages are not listed in Audit > Email History. No service restart is needed There is no need to restart any services for this setting to take effect, because the transport agent reads and applies this registry setting for each email.

processing_threshold

75

dword

optional

This parameter limits the number of emails with "Processing" status at the same time. If this parameter is not present then this number is 75 by default. Setting this value lower can reduce the processing load on both Email Gateway Security and Core.

If the parameter is 0 then the throttling is disabled.

concurrency_threshold

N/A

dword

optional

This parameter limits the number of concurrent threads submitting emails to MetaDefender Core for scanning. Example By default Email Gateway Security submits emails to Core on several threads. This causes the components of different emails to mix in the Core queue.

If this parameter is set to 1, then contents are sent to Core email by email with no overlapping, whereas If the parameter is 0 then no direct limitation is applied.

scheduled_db_optimization_time

03:00

string

optional

If this parameter is set, then Email Gateway Security performs a database optimization at the time configured.

The DB optimization time must be set in 24 hours scheme.

Syntax: <hh>:<mm>

If not set (or an invalid value is provided), no optimization is performed.

in_folder_timer_interval

1000

dword

optional

Interval –in milliseconds– between polling of new emails.

max_email_insert_count

100

dword

optional

Maximum number of emails to insert into the database in a single batch.

processing_task_timeout

10

string

optional

The email processing task timeout (in minutes). If this timer elapses, Email Gateway Security will give up trying to process the email.

restaddress

string

required

One or all of the IP addresses of the computer that runs the product to serve the web user interface.

Supported value: * : all IPv4 and IPv6 interfaces One specific IPv4 or IPv6 address : the specific IPv4 or IPv6 address

(* = all interfaces)

restport

8058

string

required

Designated port number for the web management console (REST) interface

public_rescan_port

N/A

string

optional

Designated port number for the rescan functionality web and REST interface.

Rescan functionality is always -even if this value is defined- available on the restport. For details about rescan__see Operating/Password protected attachments.

smtpaddress

string

optional

One or all of the IP addresses of the computer that runs the product to serve the SMTP interface (* means all interfaces)

Supported values Missing or * : all IPv4 and IPv6 interfaces One specific IPv4 or IPv6 address : the specific IPv4 or IPv6 address

logfile

string

optional

Location of a log file to write log messages to. If the parameter does not exist, then no logs are written to any logfile.

Empty string is not allowed as a value.

loglevel

string

optional

Level of logging. Supported values are: debug, info, warning, error.

wineventlog_level

info

string

optional

Level of logging. Supported values are: debug, info, warning, error. If the parameter does not exist, then no logs are written to the Windows Logs.

syslog

string

optional

Value can only be in form of udp://<hostname>:<port>. If the parameter does not exist, then no logs are written to syslog. (Multiple server can be specified separated with comma)

syslog_level

string

optional

Level of logging. Supported values are: debug, info, warning, error.

override

string

optional

Override specific log ids to display them on another level e.g.: "1723:error,663:info". Note: when displaying these log ids their original level will remain the same.

Empty string is allowed as a value.

cef

false

string

optional

If true, the log format is Common Event Format.

local_timezone

false

string

optional

If true, the times sent in syslog messages will be in the server's local time zone. This does not effect entries in the log file/Windows event log. When syslog is used with cef and local_timezone enabled the time zone name can vary based on the underlying system and it's settings. Examples

• Syslog

  • UTC: 2018-09-19T13:07:36Z

  • Local: 2018-09-19T15:07:36+02:00

• Syslog with CEF

  • UTC: Sep 19 13:12:47 UTC

  • Local 1: Sep 19 15:12:47 CEST

  • Local 2: Sep 19 15:12:47 Central Europe Daylight Time

nginx_logfile

[installdir] ginx ginx.log

string

optional

File name and path to store the Nginx logs.

log_rotation

false

string

optional

If true, the log file specified by the logfile entry is rotated after 24 hours from creation.

The last 30 log files are stored, the oldest log file will be deleted if number of files reaches the limit. The logfile entry must be set for this option to work.

The rotated log files are named according to the following convention: <file name from logfile entry>-<yyyyMMdd>-<nnn>.gz The trailing three digits (<nnn>) ensure that the file name is unique.

Example: mdemailsecurity-20200525.gz

All stored log files are included in MetaDefender Email Gateway Security's support package.

nginx_log_rotation

false

string

optional

If true, the log file specified by the nginx_logfile entry is rotated after 24 hours from creation.

The last 30 log files are stored, the oldest log file will be deleted if number of files reaches the limit.

The rotated log files are named according to the following convention: <file name from nginx_logfile entry>-<yyyyMMdd>-<nnn>.gz The trailing three digits (<nnn>) ensure that the file name is unique.

Example nginx-20200730.gz

All stored Nginx log files are included in MetaDefender Email Gateway Security's support package.

instance

computer name

string

required

This parameter is the name of the Email Gateway Security instance in scalable mode. This parameter is relevant when upgrading a standalone instance to scalable.

For details see Operating/Scalable deployment operation.

mode

local

string

required

This parameter tells Email Gateway Security in what scalability mode it is. This parameter must be local for bundle and standalone edition deployments.

For details see Operating/Scalable deployment operation.

antispam_proxy_ip

N/A

string

optional

IP address of the HTTP proxy to reach the anti-spam service. For details about the location of the anti-spam service see Prerequisites/External services.

antispam_proxy_port

N/A

string

optional

TCP port of the HTTP proxy to reach the anti-spam service. For details about the location of the anti-spam service see Prerequisites/External services.