Avatar of Jim Nicolis
Jim Nicolis
Flag for Australia asked on

Email not being received from a certain client from Germany

We have a issue with one of our suppliers from germany who up until May was able to send us email. Since then they are unable to send us email and they keep getting the following message:

#< #4.4.2 X-Postfix; lost connection with mail.ihs-aust.com.au[202.45.112.211] while sending MAIL FROM> #SMTP#

It coincided after we installed AVG Antispam on a SBS 2003 server running exchange 2003. i have since removed the
software but the problem still persists proving that it was not that as I did whitelist the email senders and domain.
After removing the software completely we still have the same problem.

I am not sure what to do with this and the management is getting frustrated.

Any assistance appreciated.

Thanks
Jim
Email ServersEmail SoftwareEmail ClientsSBSExchange

Avatar of undefined
Last Comment
Jim Nicolis

8/22/2022 - Mon
gplana

Just try to put the address of your client on the white list so it is not considered as spam.
Jim Nicolis

ASKER
Tried this no good, dont really understand what this message means or indicates what the problem is
gplana

Install software again and use the white list feature to add the e-mail of your client on the white list. A white list is a list of e-mail addresses that e-mail server trust.
This is the best money I have ever spent. I cannot not tell you how many times these folks have saved my bacon. I learn so much from the contributors.
rwheeler23
Jan Bacher

Is there an anti-spam appliance that accepts/filters incoming email and forwards that email to the email server?
Jim Nicolis

ASKER
Have installed software again and white listed the whole domain and email, still no luck. There is no anti-spam appliance that accepts/filters incoming email.

I asked the client if any changes have been made on their end and the said that they had changed providers but have had
had no other issue with other people.

Do you think it might be domain record related e.g TXT, PTR record related on our end, would that likely be the reason why the provider might be reject our server ?

From the sounds of it the message #< #4.4.2 X-Postfix; lost connection with mail.ihs-aust.com.au[202.45.112.211] while sending MAIL FROM> #SMTP# indicates that it is getting to us but being cut off or rejected at our end. I have checked everything I can think off and have sent at least 10-15 emails from different providers and all have come throught to us. Have checked, Spam Block lists and even done DNS tests via DNSSTUFF.COM.

I cant seem to get enough information regarding the message to be able to track down further.
Jan Bacher

on the server:

grep smtp_helo_name /etc/postfix/main.cf

what do you have set?
⚡ FREE TRIAL OFFER
Try out a week of full access for free.
Find out why thousands trust the EE community with their toughest problems.
Jim Nicolis

ASKER
is this command for linux we have a windows SBS 2003 server
Jan Bacher

yes but i would expect that you have the same configuration file.  can you look at it?
Jim Nicolis

ASKER
Yes I will and post back results
Your help has saved me hundreds of hours of internet surfing.
fblack61
ASKER CERTIFIED SOLUTION
Jim Nicolis

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
See Pricing Options
Start Free Trial
GET A PERSONALIZED SOLUTION
Ask your own question & get feedback from real experts
Find out why thousands trust the EE community with their toughest problems.
Jan Bacher

That I cannot help with.  You should probably have a moderator ping an Exchange expert.
Jim Nicolis

ASKER
Issue still not resolved at this stage still working on will update this once i find solution

Jim