Two weeks ago, I needed to mass-download a few IMAP mailboxes before migrating them to another provider.
Gist contains many scripts to do so, and I tried one of them, but it did not work as I wanted. I wanted to download all the IMAP folders, not only Inbox.
Therefore, I wrote my version of that script 😄️.
imapclient instead of the built-in
imaplib because it is more Pythonic and handles all the tedious conversions between bytes, strings, and other types.
The center of the script is the
process function. It connects to an IMAP server, queries the list of folders, and downloads all the messages from each one but trash and spam (but notice that the comparison is case-sensitive!).
client.fetch downloads all the messages you provide to it, which caused an OOM in my case. Therefore, I split the list with the message IDs into chunks. I had to write the
batches function because I was running on Python 3.11. From Python 3.12, you can use
itertools.batched instead. … [Leggi il resto]