Much like any other document, even mail messages in *.smd files can be exported as PDF with the use of a virtual PDF printer and the File → Print option in program that can work with SMD format.
Convert Mail document or message file to Adobe Portable document format.
We have found 2 software records in our database eligible for .smd to .pdf file format conversion.
Multiplatform software - convert smd to pdf on any platform
A free multi-platform productivity office suite for Windows, Mac and Linux
Convert from smd file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned smd to pdf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
An open source personal productivity suite for Windows, Macintosh and GNU/Linux