add docs/account-test-cases.md

docs/account-test-cases.md

@@ -0,0 +1,14 @@
+
+swaks --server smtp.qq.com --port 465 --tls-on-connect \
+  --auth LOGIN \
+  --auth-user "manbuzhe2009@qq.com" \
+  --auth-password "xxxxxxxxxxxxxxx" \
+  --from "manbuzhe2009@qq.com" \
+  --to "manbuzhe2008@gmail.com" \
+  --header "From: XControl Account <manbuzhe2009@qq.com>" \
+  --header "Reply-To: no-reply@svc.plus" \
+  --data "Subject: XControl SMTP Test via QQ 465
+
+Hello, this is a test email via smtp.qq.com SSL port 465.
+✅ From header added correctly!"
+