30 lines
913 B
Go
30 lines
913 B
Go
package smtpd
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import (
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"fmt"
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"net/mail"
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"strings"
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)
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func parseAddress(src string) (string, error) {
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// Mailbox specifications as per RFC5321 must have a local part and a
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// domain part separated by '@'
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if strings.Count(src, "@") != 1 {
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return "", fmt.Errorf("malformed e-mail address: %s", src)
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}
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// While a RFC5321 mailbox specification is not the same as an RFC5322
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// email address specification, it is better to accept that format and
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// parse it down to the actual address, as there are a lot of badly
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// behaving MTAs and MUAs that do it wrongly. It therefore makes sense
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// to rely on Go's built-in address parser. This does have the benefit
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// of allowing "email@example.com" as input as thats commonly used,
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// though not RFC compliant.
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addr, err := mail.ParseAddress(src)
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if err != nil {
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return "", fmt.Errorf("malformed e-mail address: %s", src)
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}
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return addr.Address, nil
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}
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