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Maxis's avatar
Maxis
Brass Contributor
Oct 05, 2023

On-prem SMTP Relay server slow

Hi, i have 2 on-prem SMTP Relay server in windows 2016;  the flow is application > SMTP Relay > DLP Server > Recipient;   but starting from last Thursday, i notice all the email always got delay for 2 hours stuck at SMTP relaye server which i can't figure out why.   Everything is good and intact from OS layer,  any advice?   

 

Both server KB, build, lastreboot, able to tlenet at port 25, able to lookup/ping DLP server, etc all same.  Thanks

    • Maxis's avatar
      Maxis
      Brass Contributor

      Kidd_Ip   i did check with security team, no change on their end;  funny part is node 01 no delay;  02 delay for 2 hours if do the message analyst.  but can't figure out the root cause.

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