Proxy problem: "imap-login: Error: proxy(USERNAME): connect(10.x.x.178, 993) failed: Cannot assign requested address (after 0 secs, local=10.x.x.104)"

[Ralf Hildebrandt]

* Ralf Hildebrandt <r at sys4.de>:

> > I'd guess you're running out of TCP ports.
> 
> I think so too, but it's somewhat unlikely! We're using 10 outbound IP
> adresses! In a random fashion (and I'm seeing this on the backend
> server!)

FYI: It was a kernel bug. 

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