Ongoing deliverability failures for Shopify-sent emails, predominantly to bigpond.com addresses (also some westnet.com.au and iinet.net.au). Recipients never receive order notifications or campaigns.
Central error/indicator: SMTP bounce from extmail.bigpond.com with code “558 5.7.1 … Message content rejected due to suspected spam” after DATA, returned by smtp.shopify.com. This error text is central to understanding the thread.
Impact: High bounce rates trigger Shopify Email’s automatic send halt (e.g., ~20% bounces early in a campaign), disrupting communications and marketing.
Tried/observed: Adding TXT records (e.g., SPF) did not resolve for some. No apparent way to whitelist on Bigpond’s side.
Likely cause (user analysis): Filtering or block at Bigpond against Shopify’s sending IPs (possible bad IP reputation or complaint-driven blocking). Note: New Google/Yahoo sender requirements (Feb 2024) mean senders should verify SPF/DKIM, but compliance alone may not fix Bigpond blocks. SPF = DNS record authorizing sending servers.
Workarounds suggested: Segment out Bigpond recipients to prevent send halts; verify SPF and other authentication.
Next steps: Contact Shopify Support to file and escalate reports.
Status: No confirmed fix; issue remains open.
Here’s another “me, too”. I have a regular customer with a bigpond email address that NEVER receives any notifications about his order (confirmation, shipping, etc). He’s nice about it and all, but wouldn’t it be nice to finally have this sorted after almost a year of being broken?
Chris