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Operating Systems
Linux
Red Hat
-bash: sendmail: command not found
Post 302995228 by drysdalk on Monday 3rd of April 2017 08:56:52 AM
04-03-2017
Hi,
One thing before going any further - you might want to think about sanitising your log entries before you post them. Posting working e-mail addresses, public IPs and internal hostnames that might give away details about your infrastructure to random folk on the Internet could potentially be something of a security risk. For example, I'm hoping that from that hostname your mail gateway isn't really running Exchange 2000 in this day and age, for instance
In any case: you'll need to now check the mail logs on the upstream mail server (the one whose hostname begins with e2ksmtp01) to see why it returned a 554 error to your Linux box. From just the 554 error on its own it's hard to say exactly what's going on here, but my guess would be that e2ksmtp01 isn't configured to accept mail from your Linux box, and is rejecting it for some reason.
That's the name of the game with SMTP debugging really: keep following the mail trail until you find the server that actually rejected the message, and then you'll hopefully find out why and what to do about it.
One thing before going any further - you might want to think about sanitising your log entries before you post them. Posting working e-mail addresses, public IPs and internal hostnames that might give away details about your infrastructure to random folk on the Internet could potentially be something of a security risk. For example, I'm hoping that from that hostname your mail gateway isn't really running Exchange 2000 in this day and age, for instance
In any case: you'll need to now check the mail logs on the upstream mail server (the one whose hostname begins with e2ksmtp01) to see why it returned a 554 error to your Linux box. From just the 554 error on its own it's hard to say exactly what's going on here, but my guess would be that e2ksmtp01 isn't configured to accept mail from your Linux box, and is rejecting it for some reason.
That's the name of the game with SMTP debugging really: keep following the mail trail until you find the server that actually rejected the message, and then you'll hopefully find out why and what to do about it.
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LEARN ABOUT LINUX
mconnect
mconnect(1) User Commands mconnect(1) NAME
mconnect - connect to SMTP mail server socket SYNOPSIS
mconnect [-p port] [-r] [hostname] DESCRIPTION
The mconnect utility opens a connection to the mail server on a given host, so that it can be tested independently of all other mail soft- ware. If no host is given, the connection is made to the local host. Servers expect to speak the Simple Mail Transfer Protocol (SMTP) on this connection. Exit by typing the quit command. Typing EOF sends an end of file to the server. An interrupt closes the connection immedi- ately and exits. OPTIONS
The following options are supported: -p port Specify the port number instead of the default SMTP port (number 25) as the next argument. -r "Raw" mode: disable the default line buffering and input handling. This produces an effect similar to telnet(1) to port number 25. OPERANDS
The following operand is supported: hostname The name of a given host. USAGE
The mconnect command is IPv6-enabled. See ip6(7P). FILES
/etc/mail/sendmail.hf help file for SMTP commands ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
telnet(1), sendmail(1M), attributes(5), ip6(7P) Postel, Jonathan B., RFC 821, Simple Mail Transfer Protocol, Information Sciences Institute, University of Southern California, August 1982. SunOS 5.10 9 Nov 1999 mconnect(1)