PH> Using BinkD (running Linux)  as the mailer.. I noticed some Mystic nodes
 PH> polling in were having this issue:

This seems to be related to a long standing issue with BinkD escaping filenames incorrectly.  You'll have to get it fixed in BinkD.

A47 has a workaround for the BinkD bugs but A46 would not.

 PH> v1.0.2.26.zip as MyGUI\x20v1.0.2.26.zip (1669424)

This is not a properly escaped filename being sent by BinkD as it does not follow the BINKP protocol specifications for filename escaping:

5.2 File Name Issues
--------------------
In Mailer-parseable commands that contain a file name, the file name MUST NOT include a whitespace (ASCII value 20 hex). The file name SHOULD NOT include symbols other than alphanumeric (A-Z,a-z,0-9) and safe characters as defined below in BNF. All other symbols are to be considered unsafe and SHOULD be escaped in the form of two hexadecimal digits preceded by a backslash (e.g. a whitespace must be transmitted as "\20").

  filename        = *pchar
  pchar           = unreserved | escape
  unreserved      = ALPHA | DIGIT | safe
  safe            = "@" | "&" | "=" | "+" | "%" | "$" | "-" | "_" |
                    "." | "!" | "(" | ")" | "#" | "|" 
  escape          = "\" HEX HEX 

... Everyone smiles in the same language.

--- Mystic BBS v1.12 A48 2022/01/10 (Windows/64)