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>NetAuthAgent has had a bug for years where you cannot connect to an FTP server if your username contains an `@` symbol.

Basic auth and FTP had a username password schema like

ftp://username@ftpserver.address.com and even

ftp://username:password@ftpserver.address.com

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> I understand the technical reasons for that, but it is technically supported by the spec and other clients work with it just fine.

I am completely aware of that, but I am aware that other clients handle it just fine. The bug actually forced me to use a different client for when I actually needed an FTP client.

I would've guessed that once it's established that the bug is caused by the app injecting the specified username into the USERINFO portion of a URL without the necessary percent-encoding, a workaround (other than using a different client) would be to manually percent-encode the username, i.e., replace the "@" with "%40" ... although this wouldn't work if the app actually did percent-encode an entered "%" despite not encoding an entered "@"!

Fascinating. I'll have to test that out!

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