SourceContext field in message trace report carries 250 2.6.0

Question

HI All,

I have generated a message trace report and I am surprised to see under SourceContext field the below value:

"myexchange.domain.com=250 2.6.0 <Host@externaldomain.COM.20201028.204127.296655.65536.1> [InternalId=37469294705361, Hostname=myexchange.domain.com] Queued mail for redundancy"

I surfed alot and did not understand why I see 250 2.6.0 code here. This scenario is where we are receiving from Azure cloud onto our on-prem Exchange server directly. WHat does this error code mean?

Basically, we have a situation where we have mails submitted from mainframe servers that are connected with app that is hosted on Azure and these mainframe submits mails onto our Exchange. Sometimes, users who are on our Exchange get delayed mails. So, we were digging if there is any reason for our Exchange servers to deny pickup mails immediately??

All our queues are very healthy and so no worries there, all I could look is into Sourcecontext for any issue and this is where it is bothering me.

Niranjan

Answer 1

Anyone got an idea on the above question?

Answer 2

Hi @Niranjan T Pattana Shetty ,
According to my research, the code “250 2.6.0” not a error code, it indicates that the requested mail operation is normal and has been completed. So the log you provided is the mail in queue has completed redundancy.
For more information, you could refer to the section 4.2.2 in this article: Network Working Group

For delayed mails, will mails received by certain users be delayed or happen randomly?
How long will it be delayed?

1. Please try to send a test email, and when the email is delayed. Please copy the email header and put it into ExRCA for message header analysis. If there is a delay in the transmission process, it will be reflected in the analysis results.
   For ExRCA: ExRCA
   
   

2.You could run the following command to check the message tracking log, check if there is any delay in the internal transmission process:

Get-TransportService | Get-Messagetrackinglog -Recipients <> -Start “" -End ""  

3.In addition, anti-virus and anti-spam software may also cause delays in mail reception. Please make sure your network is kept in good condition.

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