Mac Mail Triangle Warning Error?

Mac Mail Triangle Warning Error?

Do you frequently get a small triangle by the side of your email account in Mac Mail? If you click on the triangle does it show an error something like this? 

The server returned the error: The attempt to read data from the server “domainname.com” failed.

Chances are this is an issue with how your hosting company’s IMAP or POP server settings are configured.

If you’re the hosting company, here’s the deal. By default, the maximum number of concurrent connections from one IP in Qmail is set to 4. Anymore than that and it will start to fail or reject the connections. Normally this isn’t an issue, but if you use an email client that tries to establish more than 4 connections at once – like Mac Mail – you will run into an issue.
Here’s the fix:

for IMAP:
– edit /etc/courier-imap/imapd
– change the MAXPERIP value to a number higher than 4
– restart IMAP (/etc/init.d/courier-imap restart
for POP:
– edit /etc/courier-imap/pop3d
– change the MAXPERIP value to a number higher than 4
– restart POP (/etc/init.d/courier-imap restart

…now – go enjoy the rest of your day!

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