Solved

550 5.7.1 Unable to relay Exchange 2003

Posted on 2014-02-07
4
583 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
ID: 39843575
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
ID: 39843576
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
ID: 39844277
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
ID: 39851844
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

Want to promote your upcoming event?

Are you going to an event? Are you going to be exhibiting at a tradeshow? Talking at a conference? Using a promotional banner in your email signature ensures that your organization’s most important contacts stay in the know and can potentially spread the word about the event.

Question has a verified solution.

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

Disabling the Directory Sync Service Account in Office 365 will stop directory synchronization from working.
Read this checklist to learn more about the 15 things you should never include in an email signature.
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…
To show how to generate a certificate request 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 >> Certificates…

863 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

28 Experts available now in Live!

Get 1:1 Help Now