Return a TXT record associated with a DNS name.

Return a TXT record associated with a DNS name.

Update hash for signed message header fields.

Sign an RFC822 message and return the DKIM-Signature header line. @param message: an RFC822 formatted message (with either \\n or \\r\\n line endi

Normalize bytes/str to str for python 2/3 compatible doctests. >>> text(b'foo') 'foo' >>> text(u'foo') 'foo' >>> text('foo') '

Verify the first (topmost) DKIM signature on an RFC822 formatted message. @param message: an RFC822 formatted message (with either \\n or \\r\\n l