RFC821 and RFC822 specify an adressing form of the receiver address called "source routing". Is looks like @host1.com:email@example.com But thunderbird does not accept this kind of email address.
And it should not. From RFC2821 (which supercedes RFC821): The use of source routes is deprecated; while servers MUST be prepared to receive and handle them as discussed in section 3.3 and F.2, clients SHOULD NOT transmit them and this section was included only to provide context. Thunderbird, being a "client", complies with the "SHOULD NOT" restriction noted in RFC2821.
It would have been nice if thunderbird supported this, especially for inhouse-mailing in companies und universities, but since nobody was interested in this bug I close it.
Status: NEW → RESOLVED
Last Resolved: 8 years ago
Resolution: --- → INVALID
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