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@vrkuvrku vrkuvrku commented Mar 6, 2025

According to RFC 5322, multiple e-mail addresses should by separated by comma instead of semicolon.

3.4 RFC 5322 Address Specification

mailbox-list = (mailbox *("," mailbox)) / obs-mbox-list

Using semicolon with e.g. Exim mail server leads to "550: header syntax error" message.

With commas, sending to multiple addresses works as expected.

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