When the Jet Scheduler is configured to use SMTP to send emails for a Jet report with a long filename that includes double-byte characters (e.g., à é î ö û) - as is common in Chinese, Japanese, Korean, Polish, Romanian, Ukrainian, etc. - the file attached to the recipient's email is not a valid PDF or Excel file or and has a cryptic name (often starting with "UTF").
The SMTP Attachment object in the Microsoft .NET Framework imposes a limitation on the length of the filename when the filename or path contains at least one double-byte character. Each double-byte character shortens this limit by an additional character.
There are two workarounds for this issue:
- If possible, do not use double-byte characters in the path or filenames of Jet reports that need to be emailed through SMTP.
- Shorten the filename until it is short enough to fall within the limitation imposed.