UTF-8 encoded sender/recipient modified by Postfix

[jan.halasa@…]

Hello,

when an identity of sender or recipient contains non-ASCII characters and is encoded to Quoted-Printable (using UTF-8),
my POP3 server (panda.bk.cz - Postfix) appends ', @panda.bk.cz'
to it. I think that the problem lies in enclosing actual email
address in encoded text boundaries (=?UTF-8?Q? ... ?=).
Below are 3 versions of email headers (sent from/to Ján Halaša, I replaced my email with '...').
Those from Kmail (my desktop email client) are correct.

---

RoundCube sends to SMTP:

From: =?UTF-8?Q?J=C3=A1n=20Hala=C5=A1a=20<...>?=
To: =?UTF-8?Q?J=C3=A1n=20Hala=C5=A1a=20<...>?=

---

What appears in email:

From: =?UTF-8?Q?J=C3=A1n=20Hala=C5=A1a=20 <...>,

?=@panda.bk.cz

To: =?UTF-8?Q?J=C3=A1n=20Hala=C5=A1a=20 <...>,

?=@panda.bk.cz

---

KMail sends this:

From: =?utf-8?q?J=C3=A1n_Hala=C5=A1a?= <...>
To: =?utf-8?q?J=C3=A1n_Hala=C5=A1a?= <...>

[olive@…]

I confirm this bug. My username in roundcube is "Olivier Cortès".
when I send a mail from RC to me (and let default send encoding to UTF-8), it arrives like this in my Mailbox (other uninteresting parts deleted) :

From: =?UTF-8?Q?Olivier=20Cort=C3=A8s=20 <olivier.cortes@…>,

?=@servecole.abuledu

To: =?UTF-8?Q?Olivier=20Cort=C3=A8s=20 <olive@…>,

?=@servecole.abuledu

servecole.abuledu is the FQDN of the host running RC and postfix which sends the mail.

When I select iso-8859-1 as the transfer encoding in RC and send the mail to "olive@…" (just the e-mail adress, without my name), the headers of the mail in my recipient mailbox look like this :

From: =?ISO-8859-1?Q?Olivier=20Cort=C3=A8s=20 <olivier.cortes@…>, ?=@servecole.abuledu
To: olive@…

If I put an accentuated letter in the To: field ( = "Olivier Cortès <olive@…>") and select iso-8859-1 the message get lost, I never receive it ! See the log of the local mail server :

Sep 29 16:21:31 servecole postfix/qmgr[5256]: 87366DD384: from=<olivier.cortes@…>, size=639, nrcpt=2 (queue active)
Sep 29 16:21:31 servecole postfix/local[25132]: 87366DD384: to=<Cort@…>, orig_to=<Cort>, relay=local, delay=0, status=bounced (unknown user: "cort")
Sep 29 16:21:32 servecole postfix/local[25133]: 87366DD384: to=<Olivier@…>, orig_to=<Olivier>, relay=local, delay=1, status=bounced (unknown user: "olivier")

The To: has been split on the "è" of "Olivier Cortès <olive@…>" !!

[olive@…]

here is the patch to solve the problem. This is hackish and requires php5-imap, but it works like a charm.

in program/step/mail/sendmail.inc, line 98, put :

// replace new lines and strip ending ', '
$mailto = preg_replace($mailto_regexp, $mailto_replace, get_input_value('_to', RCUBE_INPUT_POST, TRUE, $message_charset));

+// properly re-encode $mailto if needed
+$mailaddr_regex = '/([^<]*)[<]([^>]*)[>]/';
+$recipients = explode(",", $mailto);
+foreach ($recipients as $recipient) {
+	$recipient = trim($recipient);
+	$matches = "";
+	if ( preg_match($mailaddr_regex, $recipient, $matches) ) {
+		$encoded_recipients[] = '=?' . $message_charset . '?Q?' . +imap_8bit($matches[1]) . '?= <' . $matches[2] . '>';
+	}
+	else {
+		$encoded_recipients[] = $recipient;
+	}
+}
+$mailto = implode(',', $encoded_recipients);

and don't forget the patch for the $from too (found on roundcube forums) (line 111, sendmail.inc):

-				'From' => $identity_arr['string'],
+				'From' => '=?' . $message_charset . '?Q?' . imap_8bit($identity_arr['name']) . '?= <' . $identity_arr['email'] . '>',

[olive@…]

now that there is a patch, could it be targeted at next version ? It really helps with foreing languages... (i'm french and use accents everywhere).

[honza]

Duplicate #1483976. Fixed in [bb5ddfa0].