如何检查smtp是否从命令行工作（Linux）

Question

我有一个SMTP服务器，为了这个问题的目的让我们叫它：smtp.mydomain.com。

如何检查SMTP服务器是否在工作？我可以从Linux命令行发送电子邮件吗？

Answer 1

远程登录到您的SMTP服务器一样

telnet smtp.mydomain.com 25 

语法：

telnet {smtp_domain_name} {port_number} 

复制并粘贴以下

helo your_domain.com 
mail from:<test@your_domain.com> 
rcpt to:<to_email@your_domain.com> 
data 
From: test@your_domain.com 
Subject: test mail from command line 

this is test number 1 
sent from linux box 
. 

注： “”不要忘了在代表消息结束的末尾

我在网络上发现了这个，并将其添加到堆栈溢出，因为许多事情最终都在这里。

Answer 2

[root@piwik-dev tmp]# mail -v root@localhost 
Subject: Test 
Hello world 
Cc: <Ctrl+D> 

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 
>>> 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 
>>> MAIL From:<root@piwik-dev.example.com> SIZE=46 
250 2.1.0 <root@piwik-dev.example.com>... Sender ok 
>>> RCPT To:<root@piwik-dev.example.com> 
>>> DATA 
250 2.1.5 <root@piwik-dev.example.com>... Recipient ok 
354 Enter mail, end with "." on a line by itself 
>>> . 
250 2.0.0 q7NEneju002633 Message accepted for delivery 
root@localhost... Sent (q7NEneju002633 Message accepted for delivery) 
Closing connection to [127.0.0.1] 
>>> QUIT 
221 2.0.0 piwik-dev.example.com closing connection 

Answer 3

不知道这是否有帮助，但这是一个命令行工具，它可以让您简单地从SMTP服务器发送测试邮件。 http://code.google.com/p/woodpecker-tester/

Answer 4

关于使用telnet测试postfix或其他SMTP的唯一方法是必须知道命令和语法。相反，只需使用swaks :)

thufir@dur:~$ 
thufir@dur:~$ mail -f Maildir 
"/home/thufir/Maildir": 4 messages 
> 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. 
<- 220 dur.bounceme.net ESMTP Postfix (Ubuntu) 
-> EHLO dur.bounceme.net 
<- 250-dur.bounceme.net 
<- 250-PIPELINING 
<- 250-SIZE 10240000 
<- 250-VRFY 
<- 250-ETRN 
<- 250-STARTTLS 
<- 250-ENHANCEDSTATUSCODES 
<- 250-8BITMIME 
<- 250 DSN 
-> MAIL FROM:<thufir@dur.bounceme.net> 
<- 250 2.1.0 Ok 
-> RCPT TO:<thufir@dur.bounceme.net> 
<- 250 2.1.5 Ok 
-> DATA 
<- 354 End data with <CR><LF>.<CR><LF> 
-> 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/ 
-> 
-> This is a test mailing 
-> 
-> . 
<- 250 2.0.0 Ok: queued as 52D162C3EFF 
-> QUIT 
<- 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 
>N 5 thufir@dur.bouncem     15/581 test Mon, 30 Dec 2013 14:33:17 -0800 
? 5 
Return-Path: <thufir@dur.bounceme.net> 
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 <thufir@dur.bounceme.net>; 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: <20131230223317.52D162C3EFF@dur.bounceme.net> 

This is a test mailing 

New mail has arrived. 
? q 
Held 5 messages in /home/thufir/Maildir 
thufir@dur:~$ 

这只是一个简单的命令。