24 lines
556 B
Markdown
24 lines
556 B
Markdown
# Implementation quirks
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This page documents unusual behavior of the maddy protocols implementations.
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Some of these problems break standards, some don't but still can hurt
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interoperability.
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## SMTP
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- `for` field is never included in the `Received` header field.
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This is allowed by [RFC 2821].
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## IMAP
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### `sql`
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- `\Recent` flag is not reset in all cases.
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This _does not_ break [RFC 3501]. Clients relying on it will work (much) less
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efficiently.
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[RFC 2821]: https://tools.ietf.org/html/rfc2821
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[RFC 3501]: https://tools.ietf.org/html/rfc3501
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