We have exchange 2013 and Outlook 2010/2013 clients. Messages are received from the outside and can be seen on my spam filter and are immediately forwarded to my exchange server. Once they are on the exchange server it takes anywhere from 10 to 15 minutes
for the client to receive it. This also happens internally. If I send an email to another coworker it will take about the same time for that person to receive my message. Email sent to outside email accounts such as hotmail are received almost immediately.
Any help would be appreciated. This just started about a month ago.
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