What is a “multi-string” TXT record?
TXT records have a 255-character limit per string. Longer content must be split:
Multi-string format:
"first 255 characters..." "next 255 characters..."
How it works: DNS stores multiple strings. Receivers concatenate them into one value.
When needed: Complex SPF records with many includes, or DKIM keys (especially 2048-bit) often exceed 255 characters.
Provider handling: Some DNS providers handle splitting automatically. Others require manual splitting. Some have bugs with multi-string records.
Common errors: Incorrect splitting, missing quotes, extra spaces between strings.
Long messages split across multiple pages, reassembled by the reader into the complete document.
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