Bad recipient issue for recipient email address with accented character

[martgil]

We received a reports where users are unable to send emails for recipients with accented characters such as:

Vowels with Accents:
Á, É, Í, Ó, Ú (acute accents, e.g., Spanish: José, francés)
À, È, Ì, Ò, Ù (grave accents, e.g., French: à la carte)
Â, Ê, Î, Ô, Û (circumflex, e.g., French: forêt, dîner)
Ä, Ë, Ï, Ö, Ü (umlauts/diacritical marks, e.g., German: über, schön)
Å (circle accent, e.g., Swedish: Ångström)
Ā, Ē, Ī, Ō, Ū (macrons, e.g., Latin: mātēr)
Consonants with Accents:
Ç (cedilla, e.g., French: garçon)
Ñ (tilde, e.g., Spanish: año)
Ś, Ź, Ż (acute and dot accents, e.g., Polish: śnieg, źle, żaba)
Combined Characters:
Æ, Œ (ligatures, e.g., Danish: Æble, French: Œuvre)

This names are fetched from Google Contacts - so workaround for this issue would be either to set the accented character to regular one or just unset the display name then reinstall the FlowCrypt browser extension at https://flowcrypt.com/download.

I'll check in FES code to find out more details.

Reference:

https://mail.google.com/mail/u/[email protected]/#inbox/FMfcgzQXKhNCfspmCwsBwhBVTtRfPdNq
https://mail.google.com/mail/u/[email protected]/#all/FMfcgzQXKhHPVMLCScJKLQzZfKTlNLKm
https://mail.google.com/mail/u/[email protected]/#inbox/FMfcgzQXKhRdtsgjFMlcDlKDQBhKPcph

[martgil]

Hi @sosnovsky, I hope you are well. I'd like to hear your opinion on how we can improve this situation. This has been happening frequently this week for some users. We can adjust the regex checks for inbox names, but i'm worried that there may be other characters we might have missed along the way.

[sosnovsky]

Hi @martgil, does mentioned issue happens only for password-protected messages?
Yesterday we updated our FES to the latest release which includes better handling of non-standard symbols in recipient names for password-protected messages. Can you please re-check if issue still occurs, thanks!

[martgil]

Hello @sosnovsky - thanks for checking this. I'm still actually getting the "Bad recipient" error message after testing the recent release. I'm sending a screen recording of my screen highlighting the issue via email.