"SMTPUTF8 is required, but was not offered by host: smtp.mail.yahoo.com"
I am getting this message while sending mail containing Unicode characters (in the name of the sender) via mail/postfix from Ubuntu CLI. Of course mail is not delivered (note: this is happening using CLI not GUI).
Doesn't Yahoo Mail Pro support "SMTPUTF8" required for mail/postfix?
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Bozidar Putanec
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We’d like to look more into this, please send us a DM on Twitter at @YahooCare, containing your Yahoo ID and a screenshot of your experience.