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  • IIS SMTP Queue stuck

    1. review smtp logs in C:WindowsSystem32LogFilesSMTPSVC1,  

    2. find 421 error

    2014-12-08 02:02:40 212.118.102.234 OutboundConnectionResponse SMTPSVC1 SMTP1 - 25 - - 421+Service+not+available,+closing+transmission+channel 0 0 55 0 109 SMTP - - - -
    2014-12-08 02:02:40 212.118.102.234 OutboundConnectionResponse SMTPSVC1 SMTP1 - 25 - - 421+Service+not+available,+closing+transmission+channel 0 0 55 0 109 SMTP - - - -
    2014-12-08 02:02:40 212.118.102.234 OutboundConnectionResponse SMTPSVC1 SMTP1 - 25 - - 421+Service+not+available,+closing+transmission+channel 0 0 55 0 109 SMTP - - - -
    2014-12-08 02:02:40 212.118.102.234 OutboundConnectionResponse SMTPSVC1 SMTP1 - 25 - - 421+Service+not+available,+closing+transmission+channel 0 0 55 0 94 SMTP - - - -
    2014-12-08 02:02:40 212.118.102.234 OutboundConnectionResponse SMTPSVC1 SMTP1 - 25 - - 421+Service+not+available,+closing+transmission+channel 0 0 55 0 94 SMTP - - - -
    2014-12-08 02:02:40 212.118.102.234 OutboundConnectionResponse SMTPSVC1 SMTP1 - 25 - - 421+Service+not+available,+closing+transmission+channel 0 0 55 0 94 SMTP - - - -
    2014-12-08 02:02:40 212.118.102.234 OutboundConnectionResponse SMTPSVC1 SMTP1 - 25 - - 421+Service+not+available,+closing+transmission+channel 0 0 55 0 94 SMTP - - - -

    3. check this ip

    nslookup 212.118.102.234
    Server: server1
    Address: 192.130.74.51

    Name: mail.zahid.com
    Address: 212.118.102.234

    4. telnet port 25 for this server on smtp, return 421 error

    421 Service not available, closing transmission channel

    Connection to host lost.

    5. telnet port 25 for this server on other server, return 220, connection established.

    Xshell:> telnet 212.118.102.234 25

    Connecting to 212.118.102.234:25...
    Connection established.
    To escape to local shell, press 'Ctrl+Alt+]'.
    220 *************************************************

    6. So 212.118.102.234 block our SMTP external IP address, and many emails are in queue to ready to delivery again.......

    refer: http://simplydotnet.wordpress.com/2010/08/11/outgoing-email-stuck-in-queue-folder-iis-smtp-server/

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  • 原文地址:https://www.cnblogs.com/oskb/p/4150572.html
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