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Because exchange 2007 isnt really compatible with outlook 2016 autodiscover we want to use POP and SMTP on this server. But the current receive connector rules &nbsp;only allow specific IP addresses. <br />
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Also because they have on site scan to email printers we have had to allow the permission groups such as anonymous,<br />
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Because of this i cant see how i can allow all external IP addresses without opening up a big hole for spammers to abuse the server.<br />
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Has anyone got any suggestions how i can allow local scan to email with anonymous user but only allow external IP users to email with credentials?
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Because exchange 2007 isnt really compatible with outlook 2016 autodiscover we want to use POP and SMTP on this server. But the current receive connector rules  only allow specific IP addresses. 

Also because they have on site scan to email printers we have had to allow the permission groups such as anonymous,

Because of this i cant see how i can allow all external IP addresses without opening up a big hole for spammers to abuse the server.

Has anyone got any suggestions how i can allow local scan to email with anonymous user but only allow external IP users to email with credentials?

Exchange 2007 SMTP problem

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).