gromox−eml2mbox — Utility for converting RFC5322 Internet Mail messages into a RFC4155 mbox-format mailbox
gromox−eml2mbox [file...] >out.mbox
gromox−eml2mbox reads one or more RFC5322-formated e-mail messages and re-exports them as a Unix mbox to stdout. The purpose is to make messages openable with command-line MUAs such as Alpine <https://alpineapp.email/>.
When − is given as an argument, standard input is expected to contain a list of filenames (i.e. indirection). This can help when *.eml leads to an expansion the system cannot handle:
gromox−eml2mbox *.eml >all.mbox
May result in a "Argument list too long" error in sh. Remedy for that:
find .
−maxdepth 1 −type f −name
"*.eml" | gromox−eml2mbox −
>all.mbox
To convert a single message coming from elsewhere via pipe:
stuff | gromox−exm2eml >1.mbox
gromox(7)