A client has approached us on a conversion job. The source files are Microsoft .PST files (generated from an Exmerge job). The two main requirements are to preserve all the header information, and the output must be RFC5322 compliant. I'm not privy to the reasons why.
I have tools that can open PST files and export the contents to various formats - .MSG, .EML, etc. The only format that even lists an RFC is .EML, but they all specify it as RFC822 compliant. I've tried contacting the creator of the tool but have yet to receive an answer.
I suppose the first question really is what message 'format' is RFC5322 compliant?
What professional tools exist for such a purpose?
Would the header/metadata include the SMTP headers or just fields like to, from, date, etc. ?