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telnet localhost 25 works on OL7 but not OL8

edited Nov 1, 2023 12:20AM in Linux Operating System (MOSC) 2 commentsAnswered ✓

Oracle Linux servers (OL7.9 and 8.8) running Oracle databases

We have an older app that has utl_smtp configured in the database that is used to send emails and it is working in a couple of scenarios but not another and what we have come to realize is that whatever server we have upgraded to OL8 now this test does not work.

So this works on Ol7 servers and then I can enter helo domain, etc. and eventually send an email.

OL7 server: -> telnet localhost 25

Trying ::1...

Connected to localhost.

Escape character is '^]'.

220 my.server.domain.com ESMTP Postfix

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