convert from mailbox mail storage format to Maildir format #273
Description
I have recently come across your great set of utilities for mail messages stored in Maildir format. I have several very large archived collections of mail messages in mailbox format that I would like to convert into Maildir format since I switched from Thunderbird (messages in mailbox format) to SeaMonkey (where I have chosen the Maildir format) and Neomutt (Maildir format), all on Linux.
SeaMonkey does not use the standardized Maildir format where flags are stored as part of the filename but instead stores that information in .msf files. Neomutt, of course, uses the standardized Maildir format.
It would be great to have a utility that would convert an existing mailbox file to either one of the two Maildir formats mentioned above. Conversion from mailbox format is not straightforward since there are some edge cases that need to be handled.
Is this something you have considered? I have seen that you have a mexport utility that can export Maildir format mail messages to mailbox format but also having the opposite would be great.