Avatar of Gerhardpet
Gerhardpet
Flag for Canada asked on

URGENT - SBS 2008 not sending and receiving email

I have a SBS 2008 with exchange 2007 not receiving and sending email

This the error I see in the queue
451 4.4.0 primary target ip address responded with 421 4.2.1 unable to connect

Everything was working fine until this morning when my customer called to let me know he was not receiving any emails. After I did a test I see that he is not receiving any emails either.
The email that the users are trying to send are all in the queue

Please help.
SBSExchange

Avatar of undefined
Last Comment
Gerhardpet

8/22/2022 - Mon
Gerhardpet

ASKER
I meant to say that the users can't send any emails either.
madhatter5501

check for any updates that were applied overnight, and uninstall to get back to how it was yesterday, check the firewall as well and that no port mapping on the firewall has been changed
Gerhardpet

ASKER
I don't see any update that installed since August the 4th
I started with Experts Exchange in 2004 and it's been a mainstay of my professional computing life since. It helped me launch a career as a programmer / Oracle data analyst
William Peck
madhatter5501

you can ping the server internally?  externally?  have the mx records changed?  check the send connector to the internet - are you using dns or smarthost?
Gerhardpet

ASKER
MX records have not changed and yes I can ping server internally and externally

Using smart host from DNS Made easy
madhatter5501

have you rebooted the server?
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
madhatter5501

have you contacted the smart host provider to see if they are seeing the emails that you are sending?
Gerhardpet

ASKER
no reboot yet...I have 6 users active on a ERP system database that resides on the server.
Hypercat (Deb)

Do you have any antispam or antivirus software running on these servers?
Experts Exchange has (a) saved my job multiple times, (b) saved me hours, days, and even weeks of work, and often (c) makes me look like a superhero! This place is MAGIC!
Walt Forbes
Hypercat (Deb)

This sounds like a DNS issue. Are you using forwarders on your SBS server in the DNS settings?  If so, I would recommend removing the forwarders (you do not actually need them) and see if that resolves the issue.
Gerhardpet

ASKER
no...just an untangle firewall that does the spam filtering and virus blocking
Hypercat (Deb)

So you have resolved the issue on your own?
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
ASKER CERTIFIED SOLUTION
Gerhardpet

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
Hypercat (Deb)

OK - it's good that you got it working again at any rate.  Cheers!
Gerhardpet

ASKER
I' have been monitoring the server and it is working fine now. Now sure what the problem was.
Gerhardpet

ASKER
Problem solved with rebooting
Your help has saved me hundreds of hours of internet surfing.
fblack61