Solved

550 5.7.1 Unable to relay Exchange 2003

Posted on 2014-02-07
4
580 Views
Last Modified: 2014-03-12
Exchange 2003 server (SBS) running normally without issue until today and suddenly everyone who tried to send an email got bounce with "550 5.7.1 Unable to relay".
Nothing in the system to my knowledge has changed.
Only thing I've been able to do meantime (which has worked) is to change the setting in Exchange System Manager : Default SMTP Virtual server >Properties > Access > Relay from 'Only the list below' to 'All except the list below' but I know this is NOT a recommended configuration!
(Box 'allow all computers which successfully authenticate to relay' remains ticked: did not change this).
0
Comment
Question by:laurencoull
  • 3
4 Comments
 
LVL 74

Accepted Solution

by:
Jeffrey Kane - TechSoEasy earned 500 total points
Comment Utility
More than likely you have a self-signed certificate and it has expired.

Run the Configure Email and Internet Connection Wizard (CEICW) to create a new one and fix your problem.

Jeff
0
 
LVL 74

Expert Comment

by:Jeffrey Kane - TechSoEasy
Comment Utility
Or... did you have a smarthost configured?  Perhaps that is not valid anymore.  In any event, running the CEICW is where you change that.
0
 

Author Comment

by:laurencoull
Comment Utility
Right: Well I'm fixed now but still want to explain what happened incase there's still something I need to fix.
Firstly ran the CEICW but on finish got "An Error occurred while configuring a component" with a red X at the Email config.
Then went into IIS and checked the self-signed cert which expires in 2017. Then went into System Manager / Default SMTP VS / Access / Secure Communications / Certificate. There it said there was no certificate so I chose option2: assign an existing certificate, where it found the one valid until 2017 and installed it.
I then went into Relay to change back to "'Only the list below" but found it had reverted to that setting on its own! Perhaps the certificate wizard had done this? Anyhow, email is working properly once again.
Only final comment to make is that I finally added some CALs as I noticed it was underlicensed. Just a thought but wonder if the shortage of CALs contributed to the relay issue. Ie where it says "allow all computers which successfully authenticate to relay", would a shortage of CALs cause workstations to fail to authenticate once the CAL limit has been reached? My understanding is no and that a SBS2003 server will in reality allow almost unlimited users to log in regardless of licensing, but just thought I'd throw it in as a mention.
0
 
LVL 74

Expert Comment

by:Jeffrey Kane - TechSoEasy
Comment Utility
If the CEICW failed at the Email config you need to find out why and fix it.  You should NOT configure the IIS certs manually because you will miss applying it to all the necessary places.

The CEICW will get it done right.

So, to find out what the error is, you need to look at the CEICW's log.

To view that, please enter the following in a RUN dialogue:

%sbsprogramdir%\Support\icwlog.txt

Jeff
0

Featured Post

Too many email signature updates to deal with?

Do you feel like you are taking up all of your time constantly visiting users’ desks to make changes to email signatures? Wish you could manage all signatures from one central location, easily design them and deploy them quickly to users? Well, there is an easy way!

Join & Write a Comment

ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
Following basic email etiquette rules will help you write a professional email and achieve a good, lasting impression with your contacts.
In this video we show how to create a mailbox database 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 Servers >> Data…
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…

771 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

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now