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fix: retry sending MDNs on temporary error

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Postfix returns 421 4.4.2 Error: timeout exceeded
when overloaded by CI. If MDN is not retried in this case,
`test_qr_readreceipt` fails.
This commit is contained in:
link2xt
2024-06-03 19:35:19 +00:00
parent 0be639b244
commit 0ca1318118
1 changed files with 21 additions and 15 deletions
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36
src/smtp.rs
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@@ -830,20 +830,26 @@ async fn send_mdn(context: &Context, smtp: &mut Smtp) -> Result<bool> {
.await .await
.context("failed to update MDN retries count")?; .context("failed to update MDN retries count")?;
let res = send_mdn_msg_id(context, msg_id, contact_id, smtp).await; match send_mdn_msg_id(context, msg_id, contact_id, smtp).await {
if let Err(ref err) = res { Err(err) => {
// If there is an error, for example there is no message corresponding to the msg_id in the // If there is an error, for example there is no message corresponding to the msg_id in the
// database, do not try to send this MDN again. // database, do not try to send this MDN again.
warn!( warn!(
context, context,
"Error sending MDN for {msg_id}, removing it: {err:#}." "Error sending MDN for {msg_id}, removing it: {err:#}."
); );
context context
.sql .sql
.execute("DELETE FROM smtp_mdns WHERE msg_id = ?", (msg_id,)) .execute("DELETE FROM smtp_mdns WHERE msg_id = ?", (msg_id,))
.await?; .await?;
Err(err)
}
Ok(false) => {
bail!("Temporary error while sending an MDN");
}
Ok(true) => {
// Successfully sent MDN.
Ok(true)
}
} }
// If there's a temporary error, pretend there are no more MDNs to send. It's unlikely that
// other MDNs could be sent successfully in case of connectivity problems.
res
} }