Hello together, i think i solved the Problem 🙂
Now all four tested file extensions work! (xml,pdf,txt,csv) there was an issue in your library:
in EMailSender.cpp Line 386:
Original: client.println();
New: client.println("\n");
Thanks for your help and great work!
I’m very happy, that it works now!
I put a Screenshot and the .cpp file below (had to rename it to .txt)
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