Comments (2)
foxcpp
commented on May 27, 2024
The amount of signatures attached to the message is directly related to the amount of servers that processed it. I believe allowing up to 15 signatures per message is a reasonably safe bet.
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emersion
commented on May 27, 2024
The amount of signatures attached to the message is directly related to the amount of servers that processed it.
I don't think so. Only authoritative servers should sign the message (ie. servers which have control over the sender's domain name). Intermediary servers (e.g. mailing lists) shouldn't.
So only a single server in the chain should sign the message. Note that allowing multiple signatures is still useful to allow cryptographic primitives to be gradually deployed (e.g. having messages double-signed with both RSA and ECDSA).
FWIW, OpenDKIM's default is 3.
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Related Issues (20)
- dkim: generated header not properly formatted HOT 4
- Getting error on importing this project HOT 6
- Improve line folding algorithm HOT 4
- authres: parse() function can't get correct quoted-string value HOT 3
- Extract only signature instead of complete body HOT 1
- DKIM failing for few content HOT 6
- DKIM Verify issue in relaxed mode
- RSA Public Key Format Inconsistency HOT 4
- DKIM t=s key flag not supported HOT 2
- reduce relaxedBodyCanonicalizer allocations HOT 3
- compare with EqualFold instead of ToLower HOT 2
- Remove Return-Path from header sign HOT 7
- FR: dkim-milter config file HOT 3
- queryDNSTXT may produce wrong DKIM record using the default resolver HOT 1
- Export DKIM query functionality HOT 3
- dmarc.Lookup() merges multiple TXT records into a single string HOT 2
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