I am wondering how a parser should behave when the record contains two 
identical tags. 

i.e: 'v=DMARC1; p=none; rua=mailto:t...@example.org; 
rua=mailto:t...@example.com;' 

While RFC 7489 and DMARC-bis state that any unknown tags must be ignored, I 
have not found any specifications about identical tags. 

Should we take into consideration the first tag? The second? Both? or ignore 
both? 

Best, 
Olivier 
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