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Difficulty: MediumMobile Device Synchronization and Cloud Integration

A field technician reports that email subfolders, read statuses, and sent items created on their corporate smartphone are not reflecting when accessing their mailbox from a laptop or web interface. Diagnostics reveal the mobile mail client was manually configured using POP3. Which configuration change will resolve this issue and enable full bidirectional mailbox folder synchronization across all devices?

  1. Reconfigure the mobile client to use IMAP over SSL/TLS on TCP port 993.Answer
  2. B
    Reconfigure the incoming server settings to use POP3 over SSL on TCP port 995.
  3. C
    Change the outgoing mail server configuration to use SMTP over TLS on TCP port 587.
  4. D
    Update the SIM card IMSI entry within the enterprise Mobile Device Management portal.

Answer

Reconfigure the mobile client to use IMAP over SSL/TLS on TCP port 993.
IMAP (Internet Message Access Protocol) keeps all emails on the mail server and synchronizes changes—such as creating subfolders, marking items as read, or sending messages—across all configured devices in real time. Using IMAP over secure port 993 fulfills both multi-device synchronization and security requirements.

Step-by-Step Solution

1
Identify the synchronization requirement
The scenario requires bidirectional status and folder structure synchronization between a mobile client and the server.
Changes made on one device (sent items, subfolders, read flags) must mirror across all endpoints.
2
Evaluate the current protocol limitation
POP3 downloads mail locally to a single client and does not synchronize mailbox state back to the server.
Using POP3 prevents secondary devices from seeing subfolders or sent items created on the phone.
3
Select the correct synchronization protocol
IMAP (Internet Message Access Protocol) operating securely over TCP port 993 provides real-time server-side synchronization.
IMAP leaves master copies of messages on the server while reflecting folder creation and read/unread flags across all connected clients.

Key Concept

Mobile Email Synchronization Protocols (IMAP vs POP3)
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Topics

Mobile Device Synchronization and Cloud Integration

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