The following requirements do not include the system requirements for MetaDefender Core if installed on the same system.

Minimum hardware requirements

Hardware property	Requirement	Notes
RAM	4 GB
Free SSD space	16 GB	Space details Please note that this hard disk space is only enough for installing MetaDefender Email Gateway Security and for very limited operation. Quarantine and permanently failing emails (especially with large attachments) may consume huge disk volumes. Performance concerns For performance reasons it is not recommended to use HDD instead of SSD.
CPU	4 cores

Software requirements

Software property	Requirement			Notes
	Distribution	Version(s)	Bitness	Notes
Operating system	Microsoft Windows	7 / 8 / 8.1 / 10	64 bit
	Microsoft Windows Server	2008 R2 / 2012 / 2012 R2 / 2016 / 2019	64 bit
TLS toolkit	OpenSSL	latest	32 bit	Optional, it is needed only if TLS is utilized.

MetaDefender Email Gateway Security	MetaDefender Core
4.0.0	4.7.0+
4.1.0 - 4.2.0	4.8.2+

The following scan engines must be active:

Scan engine	Version
Data sanitization	5.0.2-6 +
At least one of the available anti-malware engines	N/A

Under Policy > Security rules on Core, security rules –that are used by MetaDefender Email Gateway Security's security rules–

SHOULD enable the following Visibility of scan result:

Role	Visibility
`Everybody`	`FULL DETAILS`

Without this visibility Email Gateway Security can still work, but certain details may not be provided on the UI.

Name	Version	Optional
.NET Framework	4.5	REQUIRED

Name	Service Name	Optional
OPSWAT MetaDefender Email Gateway Security	mdemailsecurity	REQUIRED

Direction	Component / Service		Port	Note
Inbound	MetaDefender Email Gateway Security	SMTP service	10025	Customizable; adjust accordingly if modified.
Inbound	MetaDefender Email Gateway Security	Web Management Console and REST interface	8058	Customizable; adjust accordingly if modified.
Outbound	MetaDefender Core		8008	only if MetaDefender Core is installed on a remote system.

One of the following desktop browsers is required to use the Web Management Console:

Mobile layouts are not supported yet.

This section contains references to directories used by Email Gateway Security.

In further sections of this user guide the directory reference is used instead of the actual directory to refer to locations on the system disk.

Everything, except logs, is placed under the installation folder that can be customized during the installation.

Directory reference	Directory path
Installation folder	C:\Program Files\OPSWAT\Metadefender Email Security
Event log files	C:\Windows\System32\WinEvt\Logs
Log file	N log file is written by default. For details see 3.1 MetaDefender Email Gateway Security configuration.