Sendmail Does Not Honor Local_only = true Default Setting and is allowing access to port 25 from a remote system.
(Doc ID 2664023.1)
Last updated on JUNE 24, 2020
Solaris Operating System - Version 11.3 and later
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on x86-64 (64-bit)
Telent or mconnect to the server from a remote system should return Connection Refused instead it allowing the connection to port 25 to occur.
The Removal of the lo0 IPv6 interface in Solaris 11 can trigger this issue.
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