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reenter account's passwords the system will switch to encrypted mode.
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By default, the user is not allowed to enter a non-standard POP3 port
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number when configuring an external server with this plugin. This prevents
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the use of this plugin as a port scanner against other servers. However,
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if you need to allow users to access a POP3 service running on a non-
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standard port, you may create a "config.php" file by copying "config_example.php"
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and editing the list of allowable port numbers therein. If "ALL" is added
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to the list of allowable port numbers, then there will be no restriction
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on port numbers whatsoever. Be aware that although this may not represent
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any security threat to servers elsewhere on the Internet that does not
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already exist (other port scanners are freely available), if your server
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resides on a network behind a firewall, this could allow a malicious user
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to scan the servers and services behind your firewall that they'd normally
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The user will also not be allowed to enter server addresses starting
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with "10.", "192.", "127." and "localhost" by default. This prevents users
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from being able to scan an internal network for the presence of other servers
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they are not allowed to access. If other server addresses should be banned,
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or this list is too restrictive, you may create a "config.php" file by copying
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"config_example.php" and then edit the list of blocked server addresses