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Interesting challenge — I had to deal with something similar while cleaning up email data for a Shopify store I work with (opux.co.uk).
We were syncing subscriber lists from Klaviyo, and a few invalid or malformed addresses were breaking the automation flow. Using a regex pattern similar to the one in this problem helped filter those out before import.
Never realized how handy these small regex exercises can be in real-world marketing setups until then!
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Detect the Email Addresses
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Interesting challenge — I had to deal with something similar while cleaning up email data for a Shopify store I work with (opux.co.uk).
We were syncing subscriber lists from Klaviyo, and a few invalid or malformed addresses were breaking the automation flow. Using a regex pattern similar to the one in this problem helped filter those out before import.
Never realized how handy these small regex exercises can be in real-world marketing setups until then!