Solved: Domino 8.53 SMTP: HELO works, but EHLO does not

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ben_wall

Domino 8.53 SMTP: HELO works, but EHLO does not

We have a Domino 8.53 server set up as our SMTP mail gateway. From an internal host, connecting on port 25, I can connect manually and issue the HELO command and get a correct response. If I connect and issue the EHLO command, I get: "500 Syntax error, command "XXXX <hostname>" unrecognized". Any ideas?

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Sjef Bosman🇫🇷

Just tested, EHLO crap correctly returned

250-server.domain.com Hello crap ([192.168.0.4]), pleased to meet you
250-HELP
250-SIZE
250 PIPELINING

Could you try again, without making typos?

ben_wall

ASKER

I tried several times before I posted my original question. I'm glad it works OK on your server; it still does not, however, work on mine.
helo works:

ehlo does not:

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Sjef Bosman🇫🇷

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ben_wall

ASKER

Points to Sjef for having superior search-fu. This was a Cisco firewall issue.

Specifically, this was a firewall switching module that was added to a Cisco 6509 switch in our datacenter. SMTP/ESMTP filtering is part of the default setup of Cisco devices running IOS apparently, and if the SMTP filter is enabled, it does not recognize the extended command set (like EHLO). More info here:

http://www.cisco.com/en/US/docs/ios/sec_data_plane/configuration/guide/sec_esmtp_fwall_supp_ps6350_TSD_Products_Configuration_Guide_Chapter.html

http://www.cisco.com/en/US/docs/ios/security/command/reference/sec_i2.html#wp1062450 (look under "ip inspect name")

Thanks for your help!

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Sjef Bosman🇫🇷

And thank you for the feedback!

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Lotus Software produced the Lotus 1-2-3 spreadsheet program, and later developed Lotus Notes, a groupware and email system. Following its acquisition by IBM, the Notes and Domino client/server collaborative platform were expanded to include functions such as email, calendars, to-do lists, contacts management, teamrooms, discussion forums, file sharing, microblogging, instant messaging, blogs, and user directories. IBM also release SmartSuite, a comprehensive office suite, and followed that with Symphony, unrelated to the Lotus suite of the same name.