Hi,

Is this expected or not?

From: user1@fuga.example.com <user1@example.com>
To: user2@hoge.example.com <user2@example.com>
↓
a uid fetch 43055 (envelope)
* 1860 FETCH (UID 43055 ENVELOPE ("Thu, 30 Jul 2020 13:52:59 +0900" "test1" ((NIL NIL "user1" "fuga.example.com")) ((NIL NIL "user1" "fuga.example.com")) ((NIL NIL "user1" "fuga.example.com")) ((NIL NIL "user2" "hoge.example.com")) NIL NIL NIL "<WLXvFmpAZFNeQbPPITjRwimDyamnBm1@test>"))

This is an invalid email address, so it's neither correct nor incorrect to have this output. But this reminded me that I was going to discuss about this with other IETF people. Lets see what others think: https://mailarchive.ietf.org/arch/msg/extra/sqRTdsV_DGBhHu2ghdCDFo_pM8Q/

From: "user1@fuga.example.com" <user1@example.com>
To: "user2@hoge.example.com" <user2@example.com>
↓
a uid fetch 43056 (envelope)
* 1861 FETCH (UID 43056 ENVELOPE ("Thu, 30 Jul 2020 13:53:59 +0900" "test1" (("user1@fuga.example.com" NIL "user1" "example.com")) (("user1@fuga.example.com" NIL "user1" "example.com")) (("user1@fuga.example.com" NIL "user1" "example.com")) (("user2@hoge.example.com" NIL "user2" "example.com")) NIL NIL NIL "<WLXvFmpAZFNeQbPPITjRwimDyamnBm2@test>"))