slow emails

mara2021 811 Reputation points

We have several users having issues sending and receiving emails. They state that it takes hours or days to receive emails. They state that it takes a significant amount of time to send emails (without attachments).

These users have laptops that travel between home (use VPN) and office. We verified that they are not on WIFI (or connected to WIFI) when in the office. The majority of the issue is in the office. We are on-premise with Exchange 2013. The outlook client is 2016. If the user closes and re-opens outlook, emails will come in. If the user click send/receive they will receive the emails.

The users also have shared mailboxes. At least 5

I did do a DNS flush on one of the users laptops and she said it was fine for a few days.

As a test, our tech set the inbox to automatic send receive every 30 minutes for one of the affected users. We have not heard the results as of yet. Don't think this is the answer.

Any advice, troubleshooting ideas/tools would be appreciated. Thanks.

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Accepted answer
  1. Amit Singh 4,771 Reputation points

    You can monitor Exchange Server health with the native method.

    Step 1 - Monitor Server Availability and the Status of Exchange Services
    Step 2 - Monitor SMTP performance, CPU and Memory usage on an Exchange Server
    Step 3 - Track the Message Queue

    Also, remove the external DNS from the exchange. If it uses this as DNS when trying to resolve internal clients, it may fail. It might happen because Google DNS servers know nothing about your internal network. Your internal systems should point to internal DNS only.

    I hope this will help you.

    Please mark as "Accept the answer" if the above steps helps you. Your suggestion will help others also !

    1 person found this answer helpful.

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