store(set, attr, flags)
public
Sends a STORE command to alter data associated with messages in the mailbox, in particular their flags. The set parameter is a number, an array of numbers, or a Range object. Each number is a message sequence number. attr is the name of a data item to store: ‘FLAGS’ will replace the message’s flag list with the provided one, ‘+FLAGS’ will add the provided flags, and ‘-FLAGS’ will remove them. flags is a list of flags.
The return value is an array of Net::IMAP::FetchData. For example:
p imap.store(6..8, "+FLAGS", [:Deleted]) #=> [#<Net::IMAP::FetchData seqno=6, attr={"FLAGS"=>[:Seen, :Deleted]}>, \\ #<Net::IMAP::FetchData seqno=7, attr={"FLAGS"=>[:Seen, :Deleted]}>, \\ #<Net::IMAP::FetchData seqno=8, attr={"FLAGS"=>[:Seen, :Deleted]}>]