Quick side note: I'm not a coder. ubb.threads handle mails a very easy way and use only very few functions of phpmailer. The iso setting is only a default value if no parameter given while assamble the mail. It is possible to overwrite the default value while generating the mail. The mail functions in ubb.threads up to V7.6.2 are very basic and based on very old code (20 years?). At this point is changing the default in phpmailer the easy way to reach to goal. Lets see what happen in future releases of ubb.threads
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