According to email logs, forwarded email to Yahoo addresses is being bounced with an error:
Remote-MTA: dns; mta6.am0.yahoodns.net Diagnostic-Code: smtp; 554 Message not allowed [PH01] Email not accepted for policy reasons
This also affects Rogers customers as Rogers has outsourced their email to Yahoo. If you’re affected, there are a few things you can try, as outlined in a previous post on workarounds for email forwarding problems. Also note that your domains at easyDNS may already come with email bundled (see the IMAP boxes in this table) – and you can add hosted email. We are monitoring the situation, carefully making adjustments where possible, and have a ticket open with Yahoo Postmaster support.
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