Comments (5)
The spec for subaddressing is RFC 5233: https://tools.ietf.org/html/rfc5233 -- it leaves a lot up to the implementor, but the most common use case that I have seen you can just split to the first plus sign, I believe.
from email-addresses.
This could be a nice feature. It looks like people sometimes call this "sub-addressing" or "tags". I assume that all servers implementing this implement it by "split on the first + sign". If anyone can point me to a reasonable spec/rfc on how sub-addressing works, we could add it to the library, but I'm hesitant to add a function where all it does is "split on the first + sign" without having some kind of standard. How would a consumer of the library use this reliably unless they know the receiving mail server's implementation?
So, until then, it's just:
> const local = addrs.parseOneAddress('[email protected]').local;
> local.substring(0, local.indexOf('+'));
'foo'
from email-addresses.
The separator character sequence is unspecified by the RFC (intentionally). I think the '+' syntax originated with Postfix; qmail supported '-' instead. Postfix is configurable and actually allows the specification of any character (set) you like; it doesn't support multi-character separators. Gmail I suspect only supports '+'.
One other comment I have is that I'd strongly discourage websites from attempting to strip subaddresses. If the user has given you a subaddress, they mean for you to use it, and you can't know in advance exactly how the subaddress is formatted or even if '+' is the delimiter. Separating out subaddresses might be a useful feature of an email parsing library where it's being used by mail clients or other user-side utilities, however.
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While I agree it's a bad idea to strip subaddresses there are still valid use cases -- I have a "global unsubscribe" option on my site and I prefer it to block the address totally, including any subaddresses.
from email-addresses.
fwiw in addition to the plus, gmail strips out a subset of characters. for example [email protected] is the same as [email protected] and both deliver. i'd bet they allow [email protected] too but the gmail client doesn't
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Related Issues (20)
- Parser starts at the wrong place HOT 1
- rejectTLD option for input with no domain part produces error HOT 1
- Simple option doesn't seem to work HOT 1
- Line feed in address string will return null HOT 1
- Space should be disallowed or at least treated consistently HOT 1
- Allow semicolon separator HOT 2
- Release v3.0.2? HOT 2
- Parser fails when quoted string includes dquotes and comma HOT 1
- How should I detect ParsedGroup? HOT 5
- .git HOT 5
- support ES module importing HOT 2
- `parseOneAddress` sometimes returns `null` HOT 1
- `isValid` method? HOT 4
- Bracketing not supported HOT 2
- Should '[email protected]' (apostrophes included!) be a valid email address? HOT 2
- REQUEST: Could the parser get the ".com" or ".net" part of the email in an isolated part property/field name? HOT 2
- latest version with addressListSeparator not available on npm/yarn ? HOT 1
- Feature Request: Include the parsed value in the returned objects HOT 1
- Question: What do you use to generate the minified code?
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from email-addresses.