Problems with pop3d

Ken Murchison murch at
Mon Oct 24 08:27:53 EDT 2005

Fabian Hellmundt wrote:

> Hello everyone,
> we're setting up a new mailserver for our local school and had chosen 
> cyrus for imap/pop3. The point is that everything works fine (the whole 
> authentication thing with sasl etc...) except the pop3d: At first pop3d 
> works, connecting to port 110 it shows the banner and your're able to 
> authenticate. But after authenticating and quitting and trying a secound 
> time, the connection can be established indeed, but you don't get the 
> greeting banner of the pop3d. It seems to be a dead connection. Moreover 
> you get a zombie-pop3d-process every time you try to connect. And if you 
> wait a random time, cyrus seems to "heal" itself and everything works 
> fine again.

Your server is most likely running out of entropy for OpenSSL to produce 
an APOP challenge, which appears in the banner.  You'll have to find a 
way to provide OpenSSL with suitable entropy, or disable APOP by setting 
allowapop:off in imapd.conf.

Kenneth Murchison
Systems Programmer
Carnegie Mellon University

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