I see log messages like
opendkim: A19F380132: can't parse From: header value `=?UTF-8?B?IldhbHRlciIgP...VuaWNhdGlvbi5jb20+?='
Is there any reason not to mime_decode these header fields before processing them?
Murray S. Kucherawy
A From: header field containing only that is not legal. See RFC2047 section 5.
The <user@host> portion can't be encoded.
Thanks for this information, for those that may look for details:
RFC2047, section 5:
+ An 'encoded-word' MUST NOT appear in any portion of an 'addr-spec'
addr-spec = local-part "@" domain ; global address