Closed Bug 1738858 Opened 3 years ago Closed 2 years ago

Cannot send emails to international addresses (non-ASCII)

Categories

(Thunderbird :: Untriaged, enhancement)

enhancement

Tracking

(Not tracked)

RESOLVED DUPLICATE of bug 1563891

People

(Reporter: nagylzs, Unassigned)

Details

(Keywords: dupeme)

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:93.0) Gecko/20100101 Firefox/93.0

Steps to reproduce:

Try to send email to an UTF-8 address. E.g. "árvíztűrőtükrfúrógép@gmail.com" or similar. It is very interesting, that an address like this is

Actual results:

Thunderbird does not try to send out the email. (SMTP server is not connected). It just says that there are non-ASCII characters in the local part of the address, and it is not supported.

Expected results:

Send out the email.

Keywords: dupeme

Using Thunderbird 102.B8 under Windows 11Pro I tried sending a email from my Gmail account to árvíztűrőtükrfúrógép@gmail.com . I got a Delivery Status Notification (Failure) message in my inbox that reported a 550 5.1.1 error, also mentioning:

Address not found
Your message wasn't delivered to árvíztűrőtükrfúrógép@gmail.com because the address couldn't be found, or is unable to receive mail.

I did not get a copy of the message in my Sent Items folder. I then tried sending the same message (using the same recipient) from my Fastmail account. I got a popup that said:

Sending of the message failed.
There are non-ASCII characters in the local part of the recipient address árvíztűrőtükrfúrógép@gmail.com and your server does not support SMTPUTF8. Please change this address and try again.

In both cases this seems like correct behavior. I have not seen anything official about Fastmail not supporting SMTPUTF8 but I've read threads such as https://support.google.com/mail/thread/87961215/bug-in-implementation-of-idn-for-non-smptutf8-receivers?hl=en which claim that.

This was fixed by the bug 1563891 in TB91

Status: UNCONFIRMED → RESOLVED
Closed: 2 years ago
Resolution: --- → DUPLICATE
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