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Docs: note Mailgun broken display name encoding

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Document that Mailgun's API can mis-encode
display names containing both punctuation and
non-ASCII characters.

Closes #270
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medmunds
2022-05-03 15:27:05 -07:00
parent 33af7c387d
commit 6a2e30ba8f
2 changed files with 17 additions and 1 deletions
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docs/esps/mailgun.rst
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@@ -202,6 +202,15 @@ Limitations and quirks
Earlier Anymail releases did not check for these cases, and attachments
without filenames/Content-IDs would be ignored by Mailgun without notice.
**Display name problems with punctuation and non-ASCII characters**
Mailgun does not correctly handle certain display names in :mailheader:`From`,
:mailheader:`To`, and other email headers. If a display name includes *both* non-ASCII characters
and certain punctuation (such as parentheses), the resulting email will
use a non-standard encoding that causes some email clients to display
additional `"` or `\\"` characters wrapping the display name. (Verified
and reported to Mailgun engineering 3/2022. See `Anymail issue #270`_
for examples and specific details.)
**Envelope sender uses only domain**
Anymail's :attr:`~anymail.message.AnymailMessage.envelope_sender` is used to
select your Mailgun :ref:`sender domain <mailgun-sender-domain>`. For
@@ -244,7 +253,8 @@ Limitations and quirks
.. versionadded:: 8.2
.. _Anymail issue #270:
https://github.com/anymail/django-anymail/issues/270
.. _undocumented API requirement:
https://mailgun.uservoice.com/forums/156243-feature-requests/suggestions/35668606