How to check if smtp is working from commandline Linux

Question

I have a SMTP-server  for the purpose of this question lets call it  smtp mydomain com   How do i check if the SMTP-server is in working  Can I send emails manually from Linux commandline

User · Answer

root piwik-dev tmp   mail -v root localhost Subject  Test Hello world Cc    lt Ctrl D gt   root localhost    Connecting to  127 0 0 1  via relay    220 piwik-dev example com ESMTP Sendmail 8 13 8 8 13 8  Thu  23 Aug 2012 10 49 40 -0400  gt  gt  gt  EHLO piwik-dev example com 250-piwik-dev example com Hello localhost localdomain  127 0 0 1   pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-8BITMIME 250-SIZE 250-DSN 250-ETRN 250-DELIVERBY 250 HELP  gt  gt  gt  MAIL From  lt root piwik-dev example com gt  SIZE 46 250 2 1 0  lt root piwik-dev example com gt     Sender ok  gt  gt  gt  RCPT To  lt root piwik-dev example com gt   gt  gt  gt  DATA 250 2 1 5  lt root piwik-dev example com gt     Recipient ok 354 Enter mail  end with     on a line by itself  gt  gt  gt    250 2 0 0 q7NEneju002633 Message accepted for delivery root localhost    Sent  q7NEneju002633 Message accepted for delivery  Closing connection to  127 0 0 1   gt  gt  gt  QUIT 221 2 0 0 piwik-dev example com closing connection

User · Answer

Syntax for establishing a raw network connection using telnet is this   telnet  domain name   port number    So telnet to your smtp server like  telnet smtp mydomain com 25   And copy and paste the below  helo client mydomain com mail from  lt sender mydomain com gt  rcpt to  lt to email mydomain com gt  data From  test mydomain com Subject  test mail from command line  this is test number 1 sent from linux box   quit   Note   Do not forgot the     at the end which represents the end of the message  The  quit  line exits ends the session

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Not sure if this help or not but this is a command line tool which let you simply send test mails from a SMTP server priodically  http   code google com p woodpecker-tester

User · Answer

The only thing about using telnet to test postfix  or other SMTP  is that you have to know the commands and syntax   Instead  just use swaks     thufir dur     thufir dur    mail -f Maildir   home thufir Maildir   4 messages  gt     1 thufir dur bouncem                   15 553   test Mon  30 Dec 2013 10 15 12 -0800      2 thufir dur bouncem                   15 581   test Mon  30 Dec 2013 10 15 55 -0800      3 thufir dur bouncem                   15 581   test Mon  30 Dec 2013 10 29 57 -0800      4 thufir dur bouncem                   15 581   test Mon  30 Dec 2013 11 54 16 -0800   q Held 4 messages in  home thufir Maildir thufir dur     thufir dur    swaks --to thufir dur bounceme net     Trying dur bounceme net 25        Connected to dur bounceme net   lt -  220 dur bounceme net ESMTP Postfix  Ubuntu   - gt  EHLO dur bounceme net  lt -  250-dur bounceme net  lt -  250-PIPELINING  lt -  250-SIZE 10240000  lt -  250-VRFY  lt -  250-ETRN  lt -  250-STARTTLS  lt -  250-ENHANCEDSTATUSCODES  lt -  250-8BITMIME  lt -  250 DSN  - gt  MAIL FROM  lt thufir dur bounceme net gt   lt -  250 2 1 0 Ok  - gt  RCPT TO  lt thufir dur bounceme net gt   lt -  250 2 1 5 Ok  - gt  DATA  lt -  354 End data with  lt CR gt  lt LF gt   lt CR gt  lt LF gt   - gt  Date  Mon  30 Dec 2013 14 33 17 -0800  - gt  To  thufir dur bounceme net  - gt  From  thufir dur bounceme net  - gt  Subject  test Mon  30 Dec 2013 14 33 17 -0800  - gt  X-Mailer  swaks v20130209 0 jetmore org john code swaks   - gt    - gt  This is a test mailing  - gt    - gt     lt -  250 2 0 0 Ok  queued as 52D162C3EFF  - gt  QUIT  lt -  221 2 0 0 Bye     Connection closed with remote host  thufir dur     thufir dur    mail -f Maildir   home thufir Maildir   5 messages 1 new      1 thufir dur bouncem                   15 553   test Mon  30 Dec 2013 10 15 12 -0800      2 thufir dur bouncem                   15 581   test Mon  30 Dec 2013 10 15 55 -0800      3 thufir dur bouncem                   15 581   test Mon  30 Dec 2013 10 29 57 -0800      4 thufir dur bouncem                   15 581   test Mon  30 Dec 2013 11 54 16 -0800  gt N   5 thufir dur bouncem                   15 581   test Mon  30 Dec 2013 14 33 17 -0800   5 Return-Path   lt thufir dur bounceme net gt  X-Original-To  thufir dur bounceme net Delivered-To  thufir dur bounceme net Received  from dur bounceme net  localhost  127 0 0 1       by dur bounceme net  Postfix  with ESMTP id 52D162C3EFF     for  lt thufir dur bounceme net gt   Mon  30 Dec 2013 14 33 17 -0800  PST  Date  Mon  30 Dec 2013 14 33 17 -0800 To  thufir dur bounceme net From  thufir dur bounceme net Subject  test Mon  30 Dec 2013 14 33 17 -0800 X-Mailer  swaks v20130209 0 jetmore org john code swaks  Message-Id   lt 20131230223317 52D162C3EFF dur bounceme net gt   This is a test mailing  New mail has arrived    q Held 5 messages in  home thufir Maildir thufir dur       It s just one easy command

[linux] How to check if smtp is working from commandline (Linux)

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