Hans-Joachim Absent Member.
Absent Member.
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query e- mail address from Groupwise server

Hello,

how can I query our Groupwise Server (Groupwise 2014 SP1 on SLES11 SP3) from our Cisco IronPort email and web security Gateway whether an e-Maill address exist or not. Perhaps over LDAP?
We want to eliminate SPAM-Mails before they reach our Groupwisesystem.

Thanks

Hans-Joachim
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Micro Focus Expert
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Re: query e- mail address from Groupwise server

Hi Hans-Joachim,

From my experience this is not possible. The reason being that you are unable to query distribution lists and nicknames and thus will reject legitimate e-mail. I stand to be corrected on this, of course, but have personally never gotten my Cisco IronPorts to play nicely with GroupWise in this area.

Sorry 😞

Cheers,
Laura Buckley

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schleissheimer Super Contributor.
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Re: query e- mail address from Groupwise server

Hello Hans-Joachim,
I would expect that this is done by your IronPort like described over here in the Step 2:
https://www.webdigi.co.uk/blog/2009/how-to-check-if-an-email-address-exists-without-sending-an-email/

cu SveN
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schleissheimer Super Contributor.
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Re: query e- mail address from Groupwise server

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buckesfeld Absent Member.
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Re: query e- mail address from Groupwise server

Hans-Joachim,

why don't you just use SMTP? The Ironport will contact the GWIA and one of the first steps is to check if the RCPT is valid. If not, the GWIA will reply with an error and the Ironport can do with the mail whatever it is configured to do. Ours is leaving thconnection to the sending SMTP process open while it checks with the GWIA and will issue an error as well.

Uwe

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Hans-Joachim Absent Member.
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Re: query e- mail address from Groupwise server

buckesfeld;2402534 wrote:
Hans-Joachim,

why don't you just use SMTP? The Ironport will contact the GWIA and one of the first steps is to check if the RCPT is valid. If not, the GWIA will reply with an error and the Ironport can do with the mail whatever it is configured to do. Ours is leaving thconnection to the sending SMTP process open while it checks with the GWIA and will issue an error as well.

Uwe

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Thanks Uwe,

we don't use SMTP, because the GWIA is configured to accept all Recipients @mycompany.de. Switches and APC`s can send Mails to our Admins without an own Mailaddress.


Hans-Joachim
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buckesfeld Absent Member.
Absent Member.

Re: query e- mail address from Groupwise server

Hans-Joachim wrote on 08/06/2015 10:16 AM:
> we don't use SMTP, because the GWIA is configured to accept all
> Recipients @mycompany.de. Switches and APC`s can send Mails to our
> Admins without an own Mailaddress.


That's the default. Your GWIA will always accept any mail to its own internet domain, regardless the sender. Senders don't need a valid mail address anyway.
I don't see how this should stop you from letting the ironport do the same.

It should work. Ironport is exposed to the internet, MX record for your domain probably pointing to the Ironport. Receives a mail from let's say, me. My mail server opens the SMTP connection with the Ironport, and when my server sends the RCPT TO, Ironport will open a connection to the GWIA and forward the commands to the GWIA. If the GWIA replies to the RCPT TO with an OK, the Ironport sends it to my mail server and the communication continues. After the Ironport is finished doing its job, it will continue (or start again) the communication with the GWIA.

Uwe

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