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Mon, Jul 25, 2016 10:22 pm

Checking sendmail mail delivery from the command line

A user reported problems with email deliveries this morning, but when I checked the outgoing mail queue with the mailq command on the CentOS 7 server running sendmail, the queue was empty.
# mailq
/var/spool/mqueue is empty
		Total requests: 0
#

I tried sending a test message from the mail sever to an external email account with the mailx command. For the body of the message, I put some text into a file named test.txt and used the < character to provide the contents of the file as input to mailx for the body of the message. I didn't receive any error message and I didn't see any messages stuck in the mail queue when I checked it after I sent the message. But the message was not received at the destination email account.

# mailx -s "Testing" moonpoint@example.com <test.txt
# mailq
/var/spool/mqueue is empty
		Total requests: 0
#

So I then used the sendmail command, instead, to send a test message to see if it would provide me with any information that I could use for troubleshooting the problem. I created a file with the following contents to send as a test message.

# cat temp.txt
Subject: Sendmail test

This is a test.
This is only a test.

You can send a test message whose contents are contained in a text file from a command line interface using a sendmail command in the form sendmail recipient_email_address < input_file. But when I did that, I saw a "Connection refused by [127.0.0.1]" message.

[ More Info ]

[/network/email/sendmail] permanent link

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