Link to home
Start Free TrialLog in
Avatar of DDI4U
DDI4UFlag for Afghanistan

asked on

Email delayed to domains

Wow, I cannot recall I time I was more frustrated from an IT standpoint. Here is the situation.

My client recently switched to a new ISP thus new IP addresses for their network. After the cutover, inbound and outbound mail is working fine EXCEPT to domains that use as their MX records. At first I noticed that on (McAfee) they had our new IP address flagged as high risk. Obviously this is an issue from whoever used the IP address before we got it so I contacted support there and after numerous attempts I finally managed to have them reset the status to green. However the issue persists after two weeks. Email just keeps stacking up int he queues.

The client has been pressuring me to get a resolution to this so I have been contacting everyone in the line. I have tried McAfee, MX Logic, the recipient IT help, etc. McAfee told me I had to call one number, that person said I had to call another number, MX Logic told me they wouldn't help me because I am not a customer of theirs. Its been a nightmare and so I am coming here for some help.

The error listed in the Exchange queue is:
451 4.4.0 primary target IP address responded with "421.4.4.2 unable to connect."attempted failover to alternate host, but that did not succeed.Either there are no alternate hosts, or delivery failed to all alternate hosts

The messages are delayed and eventually expire. Again, this is ONLY to domains using and no other domains have issues. The server is SBS 2011 so Exchange 2010. I have a few hairs left but i cannot guarantee I will when this is all said and done.
Avatar of suriyaehnop
Flag of Malaysia image

Since you get "GREEN" your IP address but the email still delay,could you ask them to manually add your IP address to their trusted list IP address.

I have an issue before when one of our subsidary move from Exchange to GMAIL. I need to forward the email from our Exchange to GMAIL, there is time where email from Exchange to GMAIL were delay. So i did asked GMAIL vendor to add my IP address to their trusted list then the issue solved.
Avatar of DDI4U


Yes the recipients have already added our domain and IP to their whitelist but the email still hasn't been delivered. That was earlier today so it may take some time. I will check tomorrow to see if there is any change. Thanks.
Avatar of DDI4U


It's been over 24 hours since the recipient added our domain and IP to their whitelist with MX Logic and messages are still not going through. MX Logic is very unwilling to help, and I would suggest anyone that is considering using them to NOT do that! McAfee offered no support either. I dont know what else to do at this point short of routing through a smart host.
Avatar of Simon Butler (Sembee)
Simon Butler (Sembee)
Flag of United Kingdom of Great Britain and Northern Ireland image

Link to home
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of DDI4U


Thanks, I configured a smart host for these domains and email is flowing to them now. I don't want to keep it this way permanently so hopefully MX Logic will address this issue soon. Wow, I have never dealt with a more snobbish rude company in my IT career! Thanks everyone!
Avatar of lebz29

I know I am late to the game.. but this may help anyone else in the future

Contact: (

Send them them all the information you can so they can review. We just had the exact same problem as described. They responded relatively quickly. Our sending SMTP server was on no blacklists and I could send mail to anyone but hosts using mxlogic.

I could traceroute to them (same route as a working telnet test from the home network) but I could not telnet.