Question about imap (expunge response)

[Kamil Jońca]

(This is not neccesarily about dovecot, but rather IMAP protocol)

At https://drive.google.com/open?id=1j3oa5jYeSdiPbgaihq02K-u_vHbZLJZQ
is fetchmail log from my sessinon with polish email provider "Wirtualna
Polska"
As you can se fetchmail logged "* 1 EXPUNGE" as a response to "STORE"
command.
According to https://tools.ietf.org/html/rfc3501#section-7.4.1
EXPUNGE must not be sent as response to STORE command.
Am I right that their imap server is erroneous or am I missing
something?
KJ


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