(tooling-trusted-releases) branch sbp updated: Add comments describing email subject value validation

[sb...@apache.org]

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sbp pushed a commit to branch sbp
in repository https://gitbox.apache.org/repos/asf/tooling-trusted-releases.git


The following commit(s) were added to refs/heads/sbp by this push:
     new 5c49bc04 Add comments describing email subject value validation
5c49bc04 is described below

commit 5c49bc049168c0f32d320162c811df9dde852987
Author: Sean B. Palmer <se...@miscoranda.com>
AuthorDate: Tue Oct 6 14:53:12 2026 +0100

    Add comments describing email subject value validation
---
 atr/mail.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/atr/mail.py b/atr/mail.py
index 338b9240..dcbc467f 100644
--- a/atr/mail.py
+++ b/atr/mail.py
@@ -129,6 +129,8 @@ async def send(msg_data: Message, category: MailFooterCategory) -> tuple[str, li
         msg["To"] = headerregistry.Address(username=to_local, domain=to_domain)
         if msg_data.email_cc:
             msg["Cc"] = _address_header(msg_data.email_cc)
+        # SMTPUTF8 rejects multiline subjects with ValueError.
+        # The handler below prevents these messages from being sent.
         msg["Subject"] = msg_data.subject
         msg["Date"] = utils.formatdate(usegmt=True)
         msg["Message-ID"] = f"<{mid}>"


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