Hi,
I've been doing some tests recently regarding to the EHLO command, and
I was wondering whether the below detailed behavior is the expected
one or not.
I have this in my Postfix config:
smtpd_helo_restrictions =
permit_mynetworks
reject_non_fqdn_helo_hostname
reject_unknown_helo_hostname
permit
However, any time I connect via telnet to this server and specify
*any* IP address in the form [X.X.X.X], the smtpd_helo_restrictions
won't trigger.
# telnet remotepostfix.mydomain.com 25
Trying Y.Y.Y.Y...
Connected to remotepostfix.mydomain.com.
Escape character is '^]'.
220 remotepostfix.mydomain.com ESMTP Postfix (Ubuntu)
EHLO [8.8.8.8]
250-remotepostfix.mydomain.com
250-PIPELINING
250-SIZE 30720000
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
MAIL FROM: [email protected]
250 2.1.0 Ok
RCPT TO: [email protected]
250 2.1.5 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
Hi!
.
250 2.0.0 Ok: queued as 853B21202582
quit
221 2.0.0 Bye
Connection closed by foreign host.
Is this the expected behavior? Shouldn't it match any of
'reject_non_fqdn_helo_hostname' or 'reject_unknown_helo_hostname'?
Thanks,
Edwin
