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Why is the POP3/IMAP server refusing my connection attempts?
The standard server ports used for POP3 and IMAP protocols are 110 and 143 respectively. For a secure connection over SSL/TLS, the ports are 995 for POP3 and 993 for IMAP.
If your connection attempts are refused by the POP3 or IMAP server, the most probable cause is a block on the IMAP/POP3 port you are using.
Test the connectivity to your mail server on that specific port by using Telnet. To do so, follow the steps in this article.
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