Difference between revisions of "SMTP Fixup Issue"
From Roaring Penguin
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| − | + | This is also referred to as SMTP Inspection and is a feature on Cisco firewalls. Unfortunately it cause often hard to diagnose blocking of email passing through the firewall and is considered a useless anti-spam feature by most. | |
root@colo4(~)# telnet server.at.some.domain 25 | root@colo4(~)# telnet server.at.some.domain 25 | ||
Revision as of 12:36, 15 March 2016
This is also referred to as SMTP Inspection and is a feature on Cisco firewalls. Unfortunately it cause often hard to diagnose blocking of email passing through the firewall and is considered a useless anti-spam feature by most.
root@colo4(~)# telnet server.at.some.domain 25 Trying 1.2.3.4... Connected to server.at.some.domain. Escape character is '^]'. 220 *************************************************************************************************
