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Fixes for issues in previous release:

• Installation will now be executed with the correct elevated permissions when required
• Emails approved from the quarantine were not having their received lines cleaned correctly causing the emails to be incorrectly routed
• When using a EmailSecurity only license, a number of AV engines might not be correctly licensed
• When installing GFI MailEssentials on a non-English OS, the released patches may fail to install
• The Anti-Spam SPF check was failing when a DNS TXT record larger than 255 bytes was encountered
• When using a remote Active Directory setup, modules which require binding with the Active Directory might not function correctly
• The Domain Controller used for the remote Active Directory setup will be used as the sole DC to which the binding will always be performed. 
• When using the Auto-replies feature, the line breaks used in the auto-reply text might not be persisted in the returned email
• When using the GFI MailEssentials multi-site feature, the control lists (example: Whitelist and Blocklist) may not synchronise correctly 
• The Decompression Engine was detecting certain APK files as corrupted. 
• Under certain conditions, inbound emails may be detected as outbound causing spam not to be detected
• Emails released from quarantine may not be delivered to all recipients
• During Microsoft Exchange Information Store scanning, an error "Synchronization state data is corrupt or otherwise invalid" may be logged. This will cause the affected mailbox not to be scanned 
• An email might not be quarantined due to invalid XML characters in its source after parsing 

Installation requirements for GFI MailEssentials 20 SR1:

• If installing on Microsoft IIS SMTP (x86 \ x64) or Microsoft Exchange Server 2003, then Microsoft IIS with SMTP Service installed is required
• If installing on Microsoft Exchange Server 2007/2010, one of the following combinations of Exchange 2007/2010 Server Roles must be present: Mailbox and Hub Transport or (ii) Hub Transport or (iii) Edge Transport
• If installing on Microsoft Exchange Server 2007, Service Pack 1 or later is required
• If installing on Microsoft Exchange Server 2013, Mailbox or Edge role is required
• If installing on Microsoft Exchange Server 2016, Mailbox or Edge role is required
• Microsoft.NET® Framework 4/4.5
• ASP.NET® 4.0/4.5
• Internet Information Services (IIS®) World Wide Web service
• WCF HTTP Activation - required when using SpamTag plugin for Microsoft Outlook
• MSMQ - Microsoft® Messaging Queuing Service. The installation detects if MSMQ is not installed and offers the option to automatically install it.
• For more information on how to install pre-requisites for Microsoft Windows Server 2008/2012, refer to:
  Microsoft Windows Server 2008: http://go.gfi.com/?pageid=ME_Win2008
  Microsoft Windows Server 2012: http://go.gfi.com/?pageid=ME_Win2012

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