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In my company we have the MDAEMON PRO email server. Most of the accounts are IMAP and some of them are POP3.
When the client pcs open their outlook it takes ages to open their email boxes.
What can be the problem with such a delay?
What can i do as an IT administrator to solve this problem?
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In the Client desktop... Open Outlook... And in the System Tray, You will See the Outlook Icon...
Hold Ctrl (Control) Key and Right Click that Icon, And Click On Connection Status, and Can you take a Screen Shot of that and Upload it to me...
We can See, where the delay is....






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TCP 0.0.0.0:80 0.0.0.0:0 LISTENING 2956
TCP 0.0.0.0:135 0.0.0.0:0 LISTENING 1008
TCP 0.0.0.0:445 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:5405 0.0.0.0:0 LISTENING 1560
TCP 0.0.0.0:5938 0.0.0.0:0 LISTENING 2956
TCP 127.0.0.1:1039 0.0.0.0:0 LISTENING 240
TCP 127.0.0.1:1404 0.0.0.0:0 LISTENING 1816
TCP 127.0.0.1:1404 127.0.0.1:1407 ESTABLISHED 1816
TCP 127.0.0.1:1407 127.0.0.1:1404 ESTABLISHED 1816
TCP 192.168.21.7:139 0.0.0.0:0 LISTENING 4
TCP 192.168.21.7:1269 192.168.21.10:143 ESTABLISHED 4040
TCP 192.168.21.7:1399 207.46.124.239:1863 ESTABLISHED 1816
TCP 192.168.21.7:3381 192.168.21.117:1289 ESTABLISHED 1816
TCP 192.168.21.7:3596 192.168.51.101:5938 ESTABLISHED 2956
TCP 192.168.21.7:3647 87.247.124.117:5938 ESTABLISHED 2956
TCP 192.168.21.7:3837 72.26.207.163:554 ESTABLISHED 1328
TCP 192.168.21.7:3876 192.168.21.6:3268 CLOSE_WAIT 4040
TCP 192.168.21.7:4472 192.168.21.10:143 ESTABLISHED 4040
TCP 192.168.21.7:4712 213.199.141.141:80 CLOSE_WAIT 1816
TCP 192.168.21.7:4760 64.156.132.140:80 TIME_WAIT 0
UDP 0.0.0.0:445 *:* 4
UDP 0.0.0.0:500 *:* 760
UDP 0.0.0.0:3398 *:* 1392
UDP 0.0.0.0:4500 *:* 760
UDP 0.0.0.0:5405 *:* 1560
UDP 0.0.0.0:5938 *:* 2956
UDP 127.0.0.1:123 *:* 1096
UDP 127.0.0.1:1025 *:* 760
UDP 127.0.0.1:1043 *:* 704
UDP 127.0.0.1:1396 *:* 1816
UDP 127.0.0.1:1412 *:* 3488
UDP 127.0.0.1:1466 *:* 724
UDP 127.0.0.1:1900 *:* 1260
UDP 127.0.0.1:3220 *:* 1328
UDP 127.0.0.1:3875 *:* 4040
UDP 192.168.21.7:9 *:* 1816
UDP 192.168.21.7:123 *:* 1096
UDP 192.168.21.7:137 *:* 4
UDP 192.168.21.7:138 *:* 4
UDP 192.168.21.7:1900 *:* 1260
My email server ip is 192.168.21.10

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We believe in human intelligence. Our moderation policy strictly prohibits the use of LLM content in our Q&A threads.
And like i said, if the delay is only during opening the mail, it could be becuase of the Mismatch of the Authentication method in server & client.. If the Delay is there during normal operation...then you may have to involve mdaemon guys... Or a Expert in mdaemon... here, can Answer you!
What Firewall, AV program are you using on the Client pc's and on the Mail Server? This may be holding up the download process.
Email Servers
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Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.