[Evolution] Error while performing operation: RSET response error

["James L. Pearce" <jlpearce pacbell net>]

For the past several days, I've been getting the same error whenever I
send a message from my Evolution client. I thought that it might be
something at my ISP, originally, so was pretty much ignoring it, but was
on another machine in a different location and used a different mail
client, and had no problems.

The error is:

Error while performing operation:
RSET response error: Operation now in progress

Sent items stay in my Outbox, even though they do, eventually, get sent,
and the count of items in my outbox grows, though only the one or two
items is in there. Just before this started, I did receive a message
that requested a delivery and read receipt, which I understand Evo
doesn't handle?? But, that may be a red herring.

Anyway, while not a show-stopper, this is getting annoying. Does anyone
have any suggestions?

Thanks,

Jim Pearce