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01_linux:03_mail:11_telnet_smtp

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01_linux:03_mail:11_telnet_smtp [2016/08/04 07:03] – matsui01_linux:03_mail:11_telnet_smtp [2019/05/23 00:34] (現在) – matsui
行 1: 行 1:
 +====== 11 telnetでSMTP ======
  
 +下記のようにtelnetでSMTPの送信確認ができる。
 +<code>
 +$ telnet fl8.jp 25
 +Trying 182.48.51.190...
 +Connected to fl8.jp (182.48.51.190).
 +Escape character is '^]'.
 +220 mail.flateight.com ESMTP unknown
 +helo localhost
 +250 mail.flateight.com
 +MAIL FROM:sample@example.com ← 送信元アドレスを指定。（偽装可能）
 +250 2.1.0 Ok
 +RCPT TO:sample@gmail.com ← 宛先アドレスを指定。
 +250 2.1.5 Ok
 +DATA ← メールデータの転送開始。
 +354 End data with <CR><LF>.<CR><LF>
 +SUBJECT this is test ← 件名を指定。
 +test mail ← 本文を入力。
 +. ← 本文の入力の最後は「.」のみを入力しEnter
 +250 2.0.0 Ok: queued as 8D47633010A ← キューへの格納確認。
 +QUIT ← 接続切断。
 +221 2.0.0 Bye
 +Connection closed by foreign host.
 +</code>
 +
 +===== SMTP-AUTH =====
 +下記の3種類の認証方式があります。
 +SMTP-AUTH後は、通常のメール送信の通りに送ります。
 +  AUTH PALIN
 +  AUTH LOGIN
 +  AUTH CRAM-MD5
 +
 +
 +このユーザ名/パスワードを例とする。
 +username: username
 +password: password
 +
 +==== AUTH PALINの場合 ====
 +
 +<code>
 +$ printf '\000username\000password' | base64
 +AHVzZXJuYW1lAHBhc3N3b3Jk
 +
 +・ちゃんとデコードできるようならOK
 +$ printf 'AHVzZXJuYW1lAHBhc3N3b3Jk' | base64 -d
 +usernamepassword
 +</code>
 +
 +「Authentication successful」と出れば、認証OK
 +<code>
 +# telnet fl8.jp 587
 +Trying 182.48.51.190...
 +Connected to fl8.jp (182.48.51.190).
 +Escape character is '^]'.
 +220 mail.flateight.com ESMTP unknown
 +helo localhost
 +250 mail.flateight.com
 +auth plain AHVzZXJuYW1lAHBhc3N3b3Jk
 +235 2.0.0 Authentication successful
 +quit
 +</code>
 +
 +==== AUTH LOGINの場合 ====
 +<code>
 +$ printf 'username' | base64
 +dXNlcm5hbWU=
 +$ printf 'password' | base64
 +cGFzc3dvcmQ=
 +</code>
 +
 +ユーザ名（334 VXNlcm5hbWU6）パスワード（334 UGFzc3dvcmQ6）の順にエンコードされたユーザ名・パスワードを入力する。
 +「Authentication successful」が出れば認証OK
 +<code>
 +# telnet fl8.jp 587
 +Trying 182.48.51.190...
 +Connected to fl8.jp (182.48.51.190).
 +Escape character is '^]'.
 +220 mail.flateight.com ESMTP unknown
 +helo localhost
 +250 mail.flateight.com
 +auth login
 +334 VXNlcm5hbWU6
 +dXNlcm5hbWU=
 +334 UGFzc3dvcmQ6
 +cGFzc3dvcmQ=
 +235 2.0.0 Authentication successful
 +quit
 +</code>
 +
 +===== SMTPS(465)の場合 =====
 +
 +SMTPS(465)の場合は、opensslで接続する。
 +接続後は、通常のSMTPと同じようにメールコマンドで送信する。
 +
 +<code>
 +# openssl s_client -connect  fl8.jp:465
 +CONNECTED(00000003)
 +depth=0 /C=JA/ST=Itoh/L=Nagano/O=ITOH/OU=Solution/CN=cloud.flateight.com/emailAddress=matsui@ma21.ath.cx
 +verify error:num=18:self signed certificate
 +verify return:1
 +depth=0 /C=JA/ST=Itoh/L=Nagano/O=ITOH/OU=Solution/CN=cloud.flateight.com/emailAddress=matsui@ma21.ath.cx
 +verify error:num=10:certificate has expired
 +notAfter=Dec  3 07:46:40 2010 GMT
 +verify return:1
 +depth=0 /C=JA/ST=Itoh/L=Nagano/O=ITOH/OU=Solution/CN=cloud.flateight.com/emailAddress=matsui@ma21.ath.cx
 +notAfter=Dec  3 07:46:40 2010 GMT
 +verify return:1
 +---
 +Certificate chain
 + 0 s:/C=JA/ST=Itoh/L=Nagano/O=ITOH/OU=Solution/CN=cloud.flateight.com/emailAddress=matsui@ma21.ath.cx
 +   i:/C=JA/ST=Itoh/L=Nagano/O=ITOH/OU=Solution/CN=cloud.flateight.com/emailAddress=matsui@ma21.ath.cx
 +---
 +Server certificate
 +-----BEGIN CERTIFICATE-----
 +MIIDiTCCAvKgAwIBAgIBADANBgkqhkiG9w0BAQUFADCBkDELMAkGA1UEBhMCSkEx
 +DTALBgNVBAgTBEl0b2gxDzANBgNVBAcTBk5hZ2FubzENMAsGA1UEChMESVRPSDER
 +MA8GA1UECxMIU29sdXRpb24xHDAaBgNVBAMTE2Nsb3VkLmZsYXRlaWdodC5jb20x
 +ITAfBgkqhkiG9w0BCQEWEm1hdHN1aUBtYTIxLmF0aC5jeDAeFw0wOTEyMDMwNzQ2
 +NDBaFw0xMDEyMDMwNzQ2NDBaMIGQMQswCQYDVQQGEwJKQTENMAsGA1UECBMESXRv
 +aDEPMA0GA1UEBxMGTmFnYW5vMQ0wCwYDVQQKEwRJVE9IMREwDwYDVQQLEwhTb2x1
 +dGlvbjEcMBoGA1UEAxMTY2xvdWQuZmxhdGVpZ2h0LmNvbTEhMB8GCSqGSIb3DQEJ
 +ARYSbWF0c3VpQG1hMjEuYXRoLmN4MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKB
 +gQC9d/inADAS1sDdYC98XMVgeMV4Ro+32PWGJCc0pW7JuNWMdmTcz7P8eBTSDBSM
 +IRZJVoCjWDlnIR9wvkgMdlwiF9PmnzqoG4gxiZGKx5tltFeCtet0UxcsozNchYGg
 +ZVaAwy3xUclyf1O8V3mlDAsydltdP1Q80qKJ+tA/MOhyHwIDAQABo4HwMIHtMB0G
 +A1UdDgQWBBSnpShA4V5buTcbuFLu+K2N2hYaNjCBvQYDVR0jBIG1MIGygBSnpShA
 +4V5buTcbuFLu+K2N2hYaNqGBlqSBkzCBkDELMAkGA1UEBhMCSkExDTALBgNVBAgT
 +BEl0b2gxDzANBgNVBAcTBk5hZ2FubzENMAsGA1UEChMESVRPSDERMA8GA1UECxMI
 +U29sdXRpb24xHDAaBgNVBAMTE2Nsb3VkLmZsYXRlaWdodC5jb20xITAfBgkqhkiG
 +9w0BCQEWEm1hdHN1aUBtYTIxLmF0aC5jeIIBADAMBgNVHRMEBTADAQH/MA0GCSqG
 +SIb3DQEBBQUAA4GBADBgtI6Yao0uVgnRS7nv8Oi2qbxWXgFMO7dC2p+q/C/TNNog
 +PxiVYdFoat997JjNKIRSmtoj9lIyymPEjfod+hsiSzMPvUnGz6JrbclqhP3jpunA
 +i8E36ow21Kx2dArLREZhdTmTgP4WX7bqK5JvmGacI5NEN/QrdiiQoVxOEdp6
 +-----END CERTIFICATE-----
 +subject=/C=JA/ST=Itoh/L=Nagano/O=ITOH/OU=Solution/CN=cloud.flateight.com/emailAddress=matsui@ma21.ath.cx
 +issuer=/C=JA/ST=Itoh/L=Nagano/O=ITOH/OU=Solution/CN=cloud.flateight.com/emailAddress=matsui@ma21.ath.cx
 +---
 +No client certificate CA names sent
 +---
 +SSL handshake has read 1480 bytes and written 319 bytes
 +---
 +New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
 +Server public key is 1024 bit
 +Secure Renegotiation IS supported
 +Compression: NONE
 +Expansion: NONE
 +SSL-Session:
 +    Protocol  : TLSv1
 +    Cipher    : DHE-RSA-AES256-SHA
 +    Session-ID: 2FC2097C6912A922C64BC7152A05F5E082BA559EE2205886595073C41E4A5733
 +    Session-ID-ctx: 
 +    Master-Key: 869F65CB8012CF12D8A1ED2DFB2432660B540C668A2455CBFCAFCCB391340C3639F648403B09A400445C8802B8F5F698
 +    Key-Arg   : None
 +    Krb5 Principal: None
 +    Start Time: 1470296089
 +    Timeout   : 300 (sec)
 +    Verify return code: 10 (certificate has expired)
 +---
 +220 mail.flateight.com ESMTP unknown
 +helo localhost
 +250 mail.flateight.com
 +auth plain AHVzZXJuYW1lAHBhc3N3b3Jk
 +235 2.0.0 Authentication successful
 +</code>
 +
 +
 +===== Gmailへのメール送信確認 =====
 +
 +==== OKパターン ====
 +<code>
 +# (echo "EHLO mail.fl8.jp"; sleep 1
 +echo "MAIL FROM: <matsui@fl8.jp>"; sleep 1
 +echo "RCPT TO: <hoge@gmail.com>"; sleep 1
 +echo "DATA"; sleep 1
 +echo "Date: `date -R`"; sleep 1
 +echo "Subject: TEST Mail"; sleep 1
 +echo "From: matsui@fl8.jp"; sleep 1
 +echo "To: hoge@gmail.com"; sleep 1
 +echo ""
 +echo "Content"
 +echo ""
 +echo "."; sleep 1
 +echo ""
 +echo "quit") | telnet gmail-smtp-in.l.google.com 25
 +Trying 108.177.97.27...
 +Connected to gmail-smtp-in.l.google.com.
 +Escape character is '^]'.
 +220 mx.google.com ESMTP z143si3893498pfc.64 - gsmtp
 +250-mx.google.com at your service, [XXX.XXX.XXX.XX]
 +250-SIZE 157286400
 +250-8BITMIME
 +250-STARTTLS
 +250-ENHANCEDSTATUSCODES
 +250-PIPELINING
 +250-CHUNKING
 +250 SMTPUTF8
 +250 2.1.0 OK cn16si3626205plb.174 - gsmtp
 +250 2.1.5 OK cn16si3626205plb.174 - gsmtp
 +354  Go ahead cn16si3626205plb.174 - gsmtp
 +250 2.0.0 OK  1555630403 z143si3893498pfc.64 - gsmtp
 +Connection closed by foreign host.
 +</code>
 +
 +
 +==== NGパターン ====
 +
 +<code>
 +# (echo "EHLO mail.fl8.jp"; sleep 1
 +echo "MAIL FROM: <matsui@fl8.jp>"; sleep 1
 +echo "RCPT TO: <hoge@gmail.com>"; sleep 1
 +echo "DATA"; sleep 1
 +echo "Date: `date -R`"; sleep 1
 +echo "Subject: TEST Mail"; sleep 1
 +echo "From: matsui@fl8.jp"; sleep 1
 +echo "To: hoge@gmail.com"; sleep 1
 +echo ""
 +echo "Content"
 +echo ""
 +echo "."; sleep 1
 +echo ""
 +echo "quit") | telnet gmail-smtp-in.l.google.com 25
 +Trying 108.177.97.27...
 +Connected to gmail-smtp-in.l.google.com.
 +Escape character is '^]'.
 +220 mx.google.com ESMTP z143si3893498pfc.64 - gsmtp
 +250-mx.google.com at your service, [XXX.XXX.XXX.XX]
 +250-SIZE 157286400
 +250-8BITMIME
 +250-STARTTLS
 +250-ENHANCEDSTATUSCODES
 +250-PIPELINING
 +250-CHUNKING
 +250 SMTPUTF8
 +250 2.1.0 OK z143si3893498pfc.64 - gsmtp
 +250 2.1.5 OK z143si3893498pfc.64 - gsmtp
 +354  Go ahead z143si3893498pfc.64 - gsmtp
 +550-5.7.1 [153.122.116.49      18] Our system has detected that this message is
 +550-5.7.1 likely suspicious due to the very low reputation of the sending IP
 +550-5.7.1 address. To best protect our users from spam, the message has been
 +550-5.7.1 blocked. Please visit
 +550 5.7.1  https://support.google.com/mail/answer/188131 for more information. z143si3893498pfc.64 - gsmtp
 +Connection closed by foreign host.
 +</code>
 +{{tag>smtp}}

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