Re: Qpopper and "xsender"

[Scott McDermott]

Brian Curtis on Fri  1/12 15:21 -0500:
> qpopper[20154]: [username] at [isp.net] (1.2.3.4): -ERR Unknown
> command: "xsender". [pop_get_command.c:122]

My guess is that this is just server-side support for parsing X-Sender:
headers and passing them back to the client.  They're not necessary but
might allow some cases to optimize.  They can be safely ignored...we do
here without problems.