Mirrors/chatmail-core
1
0
Fork 0
mirror of https://github.com/chatmail/core.git synced 2026-04-26 18:06:35 +03:00
Code Issues Packages Projects Releases Wiki Activity

fix: revert treating some transient SMTP errors as permanent

Browse Source
This commit is contained in:
link2xt
2024-11-25 21:05:35 +00:00
committed by l
parent 717c18ed0f
commit ff3efafcfc
1 changed files with 21 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
src/smtp.rs
View File

@@ -244,33 +244,28 @@ pub(crate) async fn smtp_send(
async_smtp::error::Error::Transient(ref response) => { async_smtp::error::Error::Transient(ref response) => {
// We got a transient 4xx response from SMTP server. // We got a transient 4xx response from SMTP server.
// Give some time until the server-side error maybe goes away. // Give some time until the server-side error maybe goes away.
//
if let Some(first_word) = response.first_word() { // One particular case is
if first_word.ends_with(".1.1") // `450 4.1.2 <alice@example.org>: Recipient address rejected: Domain not found`.
|| first_word.ends_with(".1.2") // known to be returned by Postfix.
|| first_word.ends_with(".1.3") //
{ // [RFC 3463](https://tools.ietf.org/html/rfc3463#section-3.2)
// Sometimes we receive transient errors that should be permanent. // says "This code is only useful for permanent failures."
// Any extended smtp status codes like x.1.1, x.1.2 or x.1.3 that we // in X.1.1, X.1.2 and X.1.3 descriptions.
// receive as a transient error are misconfigurations of the smtp server. //
// See <https://tools.ietf.org/html/rfc3463#section-3.2> // Previous Delta Chat core versions
info!(context, "Received extended status code {first_word} for a transient error. This looks like a misconfigured SMTP server, let's fail immediately."); // from 1.51.0 to 1.151.1
SendResult::Failure(format_err!("Permanent SMTP error: {}", err)) // were treating such errors as permanent.
} else { //
// This was later reverted because such errors were observed
// for existing domains and turned out to be actually transient,
// likely caused by nameserver downtime.
info!( info!(
context, context,
"Transient error with status code {first_word}, postponing retry for later." "Transient error {response:?}, postponing retry for later."
); );
SendResult::Retry SendResult::Retry
} }
} else {
info!(
context,
"Transient error without status code, postponing retry for later."
);
SendResult::Retry
}
}
_ => { _ => {
info!( info!(
context, context,