delphi - How to receive UTF-8 encoded messages via TIdIMAP4? -
i trying receive emails using indy's tidimap4 component.
here's example code how retrieve messages:
procedure temailform.getmessage(id: string); var imap: tidimap4; msg: tidmessage; begin imap := tidimap4.create(self); imap.host := 'mailserver'; imap.username := 'username'; imap.password := 'password'; imap.connect(true); imap.selectmailbox('inbox'); msg := tidmessage.create(self); imap.uidretrieve(id, msg); subject.caption := msg.subject; if (msg.messageparts.count = 0) msgbody.text := msg.body.text else if (msg.messageparts[0] tidtext) msgbody.text := tidtext(msg.messageparts[0]).body.text; imap.disconnect(); imap.free; end; where subject tlabel , msgbody tmemo.
in case email multi-part message messages sent via gmail, body returned tidtext(msg.messageparts[0]).body.text correctly encoded , special characters german umlauts displayed correctly.
though in case email single-part message messages sent via gmx, special characters within message body returned msg.body.text replaced question marks (?).
retrieving message body instead via
imap.uidretrievetext(id, msgtext); results in mojibake äöüÃñ².
the expected characters äöüßñ².
fwiw fetching message body via telnet this:
a06 uid fetch 100 (body) * 244 fetch (body ("text" "html" ("charset" "utf-8") nil nil "7bit" 206 2) uid 1 00) a06 ok fetch completed. a07 uid fetch 100 body[text] * 244 fetch (body[text] {206} <html><head> <meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body> <div style="font-family: verdana;font-size: 12.0px;"><div>├ñ├Â├╝├ƒ </div></div></body></html> uid 100 flags (\seen)) a07 ok fetch completed. so what's correct way retrieve message body of kind of utf-8 encoded single-part emails? i.e. how decode them correctly?
tidimap4.uidretrieve() uses whatever charset specified in email itself. if single-part email not decoding correctly, not specifying proper charset begin with. have @ raw email data confirm that. mime encoded emails more specify charsets plain text emails are. non-ascii characters subject charset handling, important tidmessage know charset email encoded with.
as uidretrievetext(), not know charset of text/part part being retrieved (that todo item), cannot decode non-ascii characters. uidretrievetext2(), on other hand, fetches email's bodystructure first , locates charset of text/part being retrieved can use charset during decoding.
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