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Sendmail error: 550 5.1.8 invalid/host-not-in-DNS

 
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Old 04-21-2009
Sendmail error: 550 5.1.8 invalid/host-not-in-DNS
I have sendmail setup to relay through my external ISP. Everything was working fine until I started getting the error message (below). I don't what I did to cause this? I have read a number of related posts and it appears that I might need to configure the sending address of my server to appear differently but I am not sure if this is right or how to do this. Thanks for the help.


The original message was received at Sun, 19 Apr 2009 12:11:09 -0400
from trixbox1.localdomain [127.0.0.1]
----- The following addresses had permanent fatal errors -----

(reason: 550 5.1.8 invalid/host-not-in-DNS return address not allowed)
----- Transcript of session follows -----
... while talking to outgoing.verizon.net.:
>>> MAIL From: SIZE=32121
<<< 550 5.1.8 invalid/host-not-in-DNS return address not allowed
554 5.0.0 Service unavailable
 
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LEARN ABOUT HPUX

smfi_delrcpt

smfi_delrcpt(3N)														  smfi_delrcpt(3N)

NAME

       smfi_delrcpt() - removes a recipient from envelope of current sendmail message

SYNOPSIS

PARAMETERS

       ctx   Specifies the opaque context structure.

       rcpt  Specifies the recipient address to be removed, which is a non-NULL, null-terminated string.

DESCRIPTION

       removes the named recipient from the envelope of the current message.  can be called only from the routine.

   Notes
       The addresses to be removed must match exactly.	For example, if an address and its expanded form do not match, the address is not removed.

RETURN VALUE

       fails and returns due to the following reasons:

       o  The rcpt variable is NULL.
       o  Deleting recipients in the current connection state is invalid.
       o  Network error occurs.
       o  The is not set when the routine is called.

       returns on success.

AUTHOR

       was developed by the Sendmail Inc.

SEE ALSO

       smfi_addrcpt(3N), smfi_addheader(3N), smfi_chgheader(3N), smfi_insheader(3N), smfi_replacebody(3N).

       on

																  smfi_delrcpt(3N)