C# Imap search command with special characters like á,é

问题

I'm working on an imap client search function.

I use this command: UID SEARCH FROM PÉTER

When I run this command i get the following error: Error in IMAP command UID SEARCH: 8bit data in atom

I get this error when my pattern string(for example PÉTER) contains accentuated character.

What is the solution? What sholud I do?

Edit: I try with UTF-8 encoded string (UID SEARCH FROM PÉTER), it runs without error, but it doesn't give back any result. I check the test email account, and there are many mails with this sender.

回答1:

In IMAP you need to send 8-bit data as string literals.

Literal syntax: {byte_count} CRLF number-of-bytes

Example search: cmdTag SEARCH charset UTF-8 subject {4} CRLF test CRLF

来源：https://stackoverflow.com/questions/7426661/c-sharp-imap-search-command-with-special-characters-like-%c3%a1-%c3%a9