Postfix » Linux Ask!

Sending email using raw SMTP commands

Feb 152012

Sending email using raw SMTP commands

Answer:

You can send email(s) by connecting to your SMTP server, and using raw SMTP commands.

E.g. assume your SMTP is localhost, listening port 25, enter the commands in bold

# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 smtp.example.com ESMTP Postfix (Ubuntu)
helo localhost
250 smtp.example.com
mail from: [email protected]
250 2.1.0 Ok
rcpt to: [email protected]
250 2.1.5 Ok
data
354 End data with .
This is a test mail
.
250 2.0.0 Ok: queued as BA2FD1DB96
quit
221 2.0.0 Bye
Connection closed by foreign host.

Remove all queued message in Postfix

Advanced Linux No Responses »

Sep 102011

Remove all queued message in Postfix

Answer:

To remove queued message in your Postfix server, you should always check the queue listing first.

When you have confirmed, then you can do

1. Remove specific message based on Queue ID (You can find the ID via postqueue command)

# sudo postsuper -d Queue_ID

2. Remove all messages

# sudo postsuper -d ALL

Show current Postfix queue listing

Internet 1 Response »

Sep 082011

Show current Postfix queue listing

Answer:

To show the current Postfix queue, you can try the command "postqueue"

# postqueue -p

-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
BD7E2BF973      972 Sat Aug 27 08:57:54  [email protected]
(connect to alt4.gmail-smtp-in.l.google.com[209.85.143.27]:25: Connection timed out)
                                         [email protected]

Debug and verify Postfix configurations

Basic Linux, Internet No Responses »

Aug 312011

Debug and verify Postfix configurations

Answer:

A simple way to debug and verify your Postfix configurations is the use the sendmail command with the -bv flag.

Example:

# sendmail -bv [email protected]

No email will be sent using the above command, it just report after verifying each recipient address. This is very useful for testing the Postfix configurations.