n8n-io/n8n · error · Error

Unknown encoding ${encoding}

Error message

Unknown encoding ${encoding}

What it means

Error "Unknown encoding ${encoding}" thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/imap/src/part-data.ts:36

		if (encoding === 'QUOTED-PRINTABLE') {
			return new QuotedPrintablePartData(data, charset);
		}

		if (encoding === '7BIT') {
			return new SevenBitPartData(data);
		}

		if (encoding === '8BIT' || encoding === 'BINARY') {
			return new BinaryPartData(data, charset);
		}

		if (encoding === 'UUENCODE') {
			return new UuencodedPartData(data);
		}

		// if it gets here, the encoding is not currently supported
		throw new Error('Unknown encoding ' + encoding);
	}
}

export class Base64PartData extends PartData {
	constructor(data: string) {
		super(Buffer.from(data, 'base64'));
	}
}

export class QuotedPrintablePartData extends PartData {
	constructor(data: string, charset?: string) {
		const decoded =
			charset?.toUpperCase() === 'UTF-8' ? utf8.decode(qp.decode(data)) : qp.decode(data);
		super(Buffer.from(decoded));
	}
}

export class SevenBitPartData extends PartData {

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/imap/src/part-data.ts:36 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of n8n-io/n8n@5ac6606e81 (2026-08-12). Data as JSON: /api/errors/3ab498682ff8f018. Report an issue: GitHub.