Docs / Utility
IsEmailAddress is an AMPscript function in the utility category.
IsEmailAddress(str)
%%=IsEmailAddress(emailaddr)=%% / %%=IsEmailAddress("not-an-email")=%%
True / False
Output produced by AmpSend's AMPscript engine (validated against Salesforce's own test corpus) - not a hand-written result.
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IsEmailAddress in the official AMPscript reference - or browse the official index of AMPscript functions for platform behavior and edge cases.