If you have your DMARC set up right, anyone else who tries to send email using your domain as the "from" address will trigger a DMARC violation. It may be that having your address on a public mailing list triggers spammers to try using your domain.
Many mailing list software returns header information (including, most importantly, From header) while making some modifications to the message (e.g., adding a footer or prepending some text to the Subject header).
A lot of owners reconfigured said software to rewrite the From header since Yahoo changed their DMARC policy to a hard fail and broke quite a lot of mailing lists in doing so, as the resulting backscatter caused the software to unsubscribe people from the mailing list when delivery failed if someone sent a message from their Yahoo account.
