Commands tagged smtp (7)

  • This command will start a simple SMTP server listening on port 1025 of localhost. This server simply prints to standard output all email headers and the email body.


    74
    python -m smtpd -n -c DebuggingServer localhost:1025
    jemerick · 2009-02-05 16:50:44 3
  • Required curl version >=7.21; using ~/.netrc for authorization


    13
    curl -n --ssl-reqd --mail-from "<user@gmail.com>" --mail-rcpt "<user@server.tld>" --url smtps://smtp.gmail.com:465 -T file.txt
    mitry · 2010-10-03 15:44:53 16
  • Allows you to connect to an SMTP server over TLS, which is useful for debugging SMTP sessions. (Much like telnet to 25/tcp). Once connected you can manually issue SMTP commands in the clear (e.g. EHLO) Show Sample Output


    7
    openssl s_client -starttls smtp -crlf -connect 127.0.0.1:25
    realist · 2009-08-19 08:37:24 1
  • I use this as an alias: alias authplain "printf '\!:1\0\!:1\0\!:2' | mmencode | tr -d '\n' | sed 's/^/AUTH PLAIN /'" then.. # authplain someuser@somedomain.com secretpassword AUTH PLAIN c29tZXVzZXJAc29tZWRvbWFpbi5jb20Ac29tZXVzZXJAc29tZWRvbWFpbi5jb20Ac2VjcmV0cGFzc3dvcmQ= # Show Sample Output


    4
    printf '\!:1\0\!:1\0\!:2' | mmencode | tr -d '\n' | sed 's/^/AUTH PLAIN /'
    vwal · 2009-08-04 05:04:50 1
  • Note, this works because smtp is running


    2
    mailx bar@foo.com -s "HTML Hello" -a "Content-Type: text/html" < body.htm
    ethanmiller · 2009-05-19 04:49:26 0
  • Lots of scripts show you how to use socat to send an email to an SMTP server; this command actually emulates an SMTP server! It assumes the client is only sending to one recipient, and it's not at all smart, but it'll capture the email into a log file and the client will stop retrying. I used this to diagnose what emails were being sent by cron and subsequently discarded, but you can use it for all sorts of things. Show Sample Output


    1
    socat TCP4-LISTEN:25,fork EXEC:'bash -c \"echo 220;sleep 1;echo 250;sleep 1;echo 250;sleep 1;echo 250;sleep 1;echo 354;sleep 1;echo 250; timeout 5 cat >> /tmp/socat.log\"'
    pfudd · 2014-11-26 21:14:05 1

  • 0
    authplain() { echo -n "AUTH PLAIN "; echo -n \\0$1\\0$2\\0 | base64; }
    danky · 2014-11-26 15:24:08 0

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