Go Premium for a chance to win a PS4. Enter to Win


Error when using IMAP through Frontend.

Posted on 2008-06-26
Medium Priority
Last Modified: 2008-07-06
Hi all!

I've a NLB frontend-backend Cluster exchange topology.

Im trying to configure IMAP accounts to connect to the frontend which will forward it to the backend.

It doesnt work. Cant authenticate. I've enabled maximum IMAP logging and it appears this events:
- IMAP4SVC - Authentication - 1011 (Authentication attempt from <IP>  to <EMAIL> has failed with error 0x3b.)
- IMAP4SVC - Connection - 1016 (IMAP4 proxy connection to PROEXC00.bilbokoudala.lan for bilbokoudala/jsomoza (mailbox jsomoza) failed with error 0x3b.)

If i configure the account to connect directly to the backend, it works.

Any idea?

Question by:ikerasd
  • 2

Author Comment

ID: 21874369

Forgot to say that other that appears (on the IMAP logs) is:
      An unexpected network error occurred.

I think i've everything i need open on firewall.

And Outlook Express also says:

   Cuenta: mail2.bilbao.net
   Servidor: mail2.bilbao.net
   Nombre de usuario: bilbokoudala\jsomoza\jsomoza
   Protocolo: IMAP
   Puerto: 143
   Seguridad (SSL): 0
   Código: 800cccd1

But this is a general login error.
LVL 16

Expert Comment

ID: 21880644
The Front end server should be where SSL is set up for POP3/IMAP.  It should not be
set on the Backend server. Verify that the POP3 and IMAP services
are enabled on both servers they're disabled by default.

Accepted Solution

ikerasd earned 0 total points
ID: 21881955
The problem was with the antimalware appliance not working correctly with the IMAP protocol.

Expert Comment

ID: 21923591
This was a useful question that accurately reflected and resolved my problem. Moreover, Experts Exchange was the ONLY site that had a solution.

Featured Post

Veeam Task Manager for Hyper-V

Task Manager for Hyper-V provides critical information that allows you to monitor Hyper-V performance by displaying real-time views of CPU and memory at the individual VM-level, so you can quickly identify which VMs are using host resources.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Eseutil Hard Recovery is part of exchange tool and ensures Exchange mailbox data recovery when mailbox gets corrupt due to some problem on Exchange server.
Steps to fix error: “Couldn’t mount the database that you specified. Specified database: HU-DB; Error code: An Active Manager operation fail”
In this video we show how to create an Accepted Domain in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Ac…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…
Suggested Courses

927 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question