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Short answer is yes, and you can reference this ee solve on the matter <br />
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<a href="https://www.experts-exchange.com/questions/26162011/Cisco-ASA-5510-and-SMTP-relay.html" rel="ugc">https://www.experts-exchange.com/questions/26162011/Cisco-ASA-5510-and-SMTP-relay.html</a>
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Short answer is yes, and you can reference this ee solve on the matter

https://www.experts-exchange.com/questions/26162011/Cisco-ASA-5510-and-SMTP-relay.html [https://www.experts-exchange.com/questions/26162011/Cisco-ASA-5510-and-SMTP-relay.html]

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Hello experts-exchange, can the ASA 5520 be configured for SMTP Gateway relay use?<br />
Thank you,<br />
Nina
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Hello experts-exchange, can the ASA 5520 be configured for SMTP Gateway relay use?
Thank you,
Nina

ASA 5520 SMTP Gateway relay

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.