IllegalArgumentException with Quoted-Printable EML File

[Faelean]

We have an EML File where when running the following code:

try (FileInputStream fileInputStream = new FileInputStream(emlFileName)) {	
	Email email = EmailConverter.emlToEmail(fileInputStream);	
	System.out.println(email.getHTMLText());
}

we get the following exception:

Exception in thread "main" java.lang.IllegalArgumentException: unknown content transfer encoder: QUOTED-PRINTABLE
	at org.simplejavamail.api.email.ContentTransferEncoding.lambda$byEncoder$1(ContentTransferEncoding.java:52)
	at java.base/java.util.Optional.orElseThrow(Optional.java:408)
	at org.simplejavamail.api.email.ContentTransferEncoding.byEncoder(ContentTransferEncoding.java:52)
	at org.simplejavamail.converter.EmailConverter.buildEmailFromMimeMessage(EmailConverter.java:667)
	at org.simplejavamail.converter.EmailConverter.mimeMessageToEmailBuilder(EmailConverter.java:136)
	at org.simplejavamail.converter.EmailConverter.mimeMessageToEmailBuilder(EmailConverter.java:122)
	at org.simplejavamail.converter.EmailConverter.emlToEmailBuilder(EmailConverter.java:390)
	at org.simplejavamail.converter.EmailConverter.emlToEmailBuilder(EmailConverter.java:369)
	at org.simplejavamail.converter.EmailConverter.emlToEmail(EmailConverter.java:303)
	at org.simplejavamail.converter.EmailConverter.emlToEmail(EmailConverter.java:295)
	at ParseP7s.main(ParseP7s.java:22)

I've tested it with the following versions:

• 7.1.1 --> Issue is not present, Email is parsed as expected
• 7.4.0 --> Issue is present
• 7.5.0 --> Issue is present

I can not publish the example mail we're using, but if you need it I can send it directly to you.