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I have my email stored on a server and I read it from a couple of devices (usually either my smartphone or laptop). I often view messages on my phone but want to respond on my laptop if a longer response is called for.
I'd like to have have fetchmail on my laptop download IMAP messages not based on the "Seen" flag but based on whether or not the laptop has seen them. This seems to work using POP3 with the UIDL flag. Is there anything equivalent I can do with IMAP?