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email-amazon
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many recipients

This commit is contained in:
Andreas Knuth 2025-10-18 15:48:38 -05:00
parent 5548796968
commit 012e464ec1
1 changed files with 114 additions and 37 deletions
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151
worker.py
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@ -67,8 +67,11 @@ def get_queue_url() -> str:
raise Exception(f"Failed to get queue URL for {WORKER_DOMAIN}: {e}") raise Exception(f"Failed to get queue URL for {WORKER_DOMAIN}: {e}")
def mark_as_processed(bucket: str, key: str): def mark_as_processed(bucket: str, key: str, invalid_inboxes: list = None):
"""Markiert E-Mail als erfolgreich zugestellt""" """
Markiert E-Mail als erfolgreich zugestellt
Setzt processed=true auch wenn manche Recipients fehlgeschlagen sind
"""
try: try:
head = s3.head_object(Bucket=bucket, Key=key) head = s3.head_object(Bucket=bucket, Key=key)
metadata = head.get('Metadata', {}) or {} metadata = head.get('Metadata', {}) or {}
@ -80,6 +83,11 @@ def mark_as_processed(bucket: str, key: str):
metadata.pop('processing_started', None) metadata.pop('processing_started', None)
metadata.pop('queued_at', None) metadata.pop('queued_at', None)
# Invalid inboxes speichern falls vorhanden
if invalid_inboxes:
metadata['invalid_inboxes'] = ','.join(invalid_inboxes)
log(f"⚠ Invalid inboxes recorded: {', '.join(invalid_inboxes)}", 'WARNING')
s3.copy_object( s3.copy_object(
Bucket=bucket, Bucket=bucket,
Key=key, Key=key,
@ -95,7 +103,10 @@ def mark_as_processed(bucket: str, key: str):
def mark_as_failed(bucket: str, key: str, error: str, receive_count: int): def mark_as_failed(bucket: str, key: str, error: str, receive_count: int):
"""Markiert E-Mail als fehlgeschlagen""" """
Markiert E-Mail als komplett fehlgeschlagen
Wird nur aufgerufen wenn ALLE Recipients fehlschlagen
"""
try: try:
head = s3.head_object(Bucket=bucket, Key=key) head = s3.head_object(Bucket=bucket, Key=key)
metadata = head.get('Metadata', {}) or {} metadata = head.get('Metadata', {}) or {}
@ -144,14 +155,34 @@ def is_temporary_smtp_error(error_msg: str) -> bool:
return any(indicator in error_lower for indicator in temporary_indicators) return any(indicator in error_lower for indicator in temporary_indicators)
def is_permanent_recipient_error(error_msg: str) -> bool:
"""
Prüft ob Fehler permanent für diesen Recipient ist (Inbox existiert nicht)
550 = Mailbox not found, 551 = User not local, 553 = Mailbox name invalid
"""
permanent_indicators = [
'550', # Mailbox unavailable / not found
'551', # User not local
'553', # Mailbox name not allowed / invalid
'mailbox not found',
'user unknown',
'no such user',
'recipient rejected',
'does not exist',
'invalid recipient',
'unknown user'
]
error_lower = error_msg.lower()
return any(indicator in error_lower for indicator in permanent_indicators)
def send_email(from_addr: str, recipient: str, raw_message: bytes) -> tuple: def send_email(from_addr: str, recipient: str, raw_message: bytes) -> tuple:
""" """
Sendet E-Mail via SMTP Sendet E-Mail via SMTP an EINEN Empfänger
Returns: (success: bool, error: str or None) Returns: (success: bool, error: str or None, is_permanent: bool)
""" """
log(f"Connecting to {SMTP_HOST}:{SMTP_PORT} (TLS: {SMTP_USE_TLS})")
try: try:
with smtplib.SMTP(SMTP_HOST, SMTP_PORT, timeout=30) as smtp: with smtplib.SMTP(SMTP_HOST, SMTP_PORT, timeout=30) as smtp:
smtp.ehlo() smtp.ehlo()
@ -161,17 +192,15 @@ def send_email(from_addr: str, recipient: str, raw_message: bytes) -> tuple:
try: try:
smtp.starttls() smtp.starttls()
smtp.ehlo() smtp.ehlo()
log("✓ STARTTLS enabled")
except Exception as e: except Exception as e:
log(f"STARTTLS failed: {e}", 'WARNING') log(f" STARTTLS failed: {e}", 'WARNING')
# Authentication falls konfiguriert # Authentication falls konfiguriert
if SMTP_USER and SMTP_PASS: if SMTP_USER and SMTP_PASS:
try: try:
smtp.login(SMTP_USER, SMTP_PASS) smtp.login(SMTP_USER, SMTP_PASS)
log("✓ SMTP authenticated")
except Exception as e: except Exception as e:
log(f"SMTP auth failed: {e}", 'WARNING') log(f" SMTP auth failed: {e}", 'WARNING')
# E-Mail senden # E-Mail senden
result = smtp.sendmail(from_addr, [recipient], raw_message) result = smtp.sendmail(from_addr, [recipient], raw_message)
@ -180,32 +209,37 @@ def send_email(from_addr: str, recipient: str, raw_message: bytes) -> tuple:
if isinstance(result, dict) and result: if isinstance(result, dict) and result:
# Empfänger wurde abgelehnt # Empfänger wurde abgelehnt
error = result.get(recipient, 'Unknown refusal') error = result.get(recipient, 'Unknown refusal')
log(f"✗ Recipient refused: {error}", 'ERROR') is_permanent = is_permanent_recipient_error(str(error))
return False, str(error) log(f" ✗ {recipient}: {error} ({'permanent' if is_permanent else 'temporary'})", 'ERROR')
return False, str(error), is_permanent
else: else:
# Erfolgreich # Erfolgreich
log(f"✓ Email delivered to {recipient}", 'SUCCESS') log(f" ✓ {recipient}: Delivered", 'SUCCESS')
return True, None return True, None, False
except smtplib.SMTPException as e: except smtplib.SMTPException as e:
log(f"✗ SMTP error: {e}", 'ERROR') error_msg = str(e)
return False, str(e) is_permanent = is_permanent_recipient_error(error_msg)
log(f" ✗ {recipient}: SMTP error - {error_msg}", 'ERROR')
return False, error_msg, is_permanent
except Exception as e: except Exception as e:
log(f"✗ Connection error: {e}", 'ERROR') # Connection errors sind immer temporär
return False, str(e) log(f" ✗ {recipient}: Connection error - {e}", 'ERROR')
return False, str(e), False
def process_message(message_body: dict, receive_count: int) -> bool: def process_message(message_body: dict, receive_count: int) -> bool:
""" """
Verarbeitet eine E-Mail aus der Queue Verarbeitet eine E-Mail aus der Queue
Kann mehrere Recipients haben - sendet an alle
Returns: True wenn erfolgreich (Message löschen), False bei Fehler (Retry) Returns: True wenn erfolgreich (Message löschen), False bei Fehler (Retry)
""" """
bucket = message_body['bucket'] bucket = message_body['bucket']
key = message_body['key'] key = message_body['key']
from_addr = message_body['from'] from_addr = message_body['from']
recipient = message_body['recipient'] # Nur 1 Empfänger recipients = message_body['recipients'] # Liste von Empfängern
domain = message_body['domain'] domain = message_body['domain']
subject = message_body.get('subject', '(unknown)') subject = message_body.get('subject', '(unknown)')
message_id = message_body.get('message_id', '(unknown)') message_id = message_body.get('message_id', '(unknown)')
@ -213,9 +247,12 @@ def process_message(message_body: dict, receive_count: int) -> bool:
log(f"\n{'='*70}") log(f"\n{'='*70}")
log(f"Processing email (Attempt #{receive_count}):") log(f"Processing email (Attempt #{receive_count}):")
log(f" MessageId: {message_id}") log(f" MessageId: {message_id}")
log(f" S3 Key: {key}")
log(f" Domain: {domain}") log(f" Domain: {domain}")
log(f" From: {from_addr}") log(f" From: {from_addr}")
log(f" To: {recipient}") log(f" Recipients: {len(recipients)}")
for recipient in recipients:
log(f" - {recipient}")
log(f" Subject: {subject}") log(f" Subject: {subject}")
log(f" S3: s3://{bucket}/{key}") log(f" S3: s3://{bucket}/{key}")
log(f"{'='*70}") log(f"{'='*70}")
@ -238,35 +275,75 @@ def process_message(message_body: dict, receive_count: int) -> bool:
log(f"✗ Failed to load from S3: {e}", 'ERROR') log(f"✗ Failed to load from S3: {e}", 'ERROR')
return False # Könnte temporär sein - retry return False # Könnte temporär sein - retry
# E-Mail senden # An alle Recipients senden
success, error = send_email(from_addr, recipient, raw_bytes) log(f"\n📤 Sending to {len(recipients)} recipient(s)...")
log(f"Connecting to {SMTP_HOST}:{SMTP_PORT} (TLS: {SMTP_USE_TLS})")
if success: successful = []
# Erfolgreich zugestellt failed_temporary = []
mark_as_processed(bucket, key) failed_permanent = []
for recipient in recipients:
success, error, is_permanent = send_email(from_addr, recipient, raw_bytes)
if success:
successful.append(recipient)
elif is_permanent:
failed_permanent.append(recipient)
else:
failed_temporary.append(recipient)
# Ergebnis-Zusammenfassung
log(f"\n📊 Delivery Results:")
log(f" ✓ Successful: {len(successful)}/{len(recipients)}")
log(f" ✗ Failed (temporary): {len(failed_temporary)}")
log(f" ✗ Failed (permanent): {len(failed_permanent)}")
# Entscheidungslogik
if len(successful) > 0:
# Mindestens 1 Recipient erfolgreich
# → processed=true setzen, invalid_inboxes tracken
invalid_inboxes = failed_permanent if failed_permanent else None
mark_as_processed(bucket, key, invalid_inboxes)
log(f"{'='*70}") log(f"{'='*70}")
log(f"✅ Email delivered successfully", 'SUCCESS') log(f"✅ Email delivered to {len(successful)} recipient(s)", 'SUCCESS')
if failed_permanent:
log(f"⚠ {len(failed_permanent)} invalid inbox(es): {', '.join(failed_permanent)}", 'WARNING')
if failed_temporary:
log(f"⚠ {len(failed_temporary)} temporary failure(s) - NOT retrying (at least 1 success)", 'WARNING')
log(f"{'='*70}\n") log(f"{'='*70}\n")
return True # Message löschen return True # Message löschen
else: elif len(failed_permanent) == len(recipients):
# Fehler aufgetreten # ALLE Recipients sind permanent fehlgeschlagen (alle Inboxen ungültig)
error_msg = error or "Unknown SMTP error" # → processed=true setzen mit allen als invalid_inboxes
# Prüfe ob temporärer Fehler (Retry sinnvoll) mark_as_processed(bucket, key, failed_permanent)
if receive_count < 3 and is_temporary_smtp_error(error_msg):
log(f"⚠ Temporary error detected, will retry", 'WARNING') log(f"{'='*70}")
log(f"✗ All recipients permanently failed (invalid inboxes)", 'ERROR')
log(f"{'='*70}\n")
return True # Message löschen (nicht retryable)
else:
# Nur temporäre Fehler, keine erfolgreichen Deliveries
# → Retry wenn noch Versuche übrig
if receive_count < 3:
log(f"⚠ All failures are temporary, will retry", 'WARNING')
log(f"{'='*70}\n") log(f"{'='*70}\n")
return False # Message NICHT löschen → Retry return False # Message NICHT löschen → Retry
else: else:
# Permanenter Fehler oder max retries erreicht # Max retries erreicht → als failed markieren
mark_as_failed(bucket, key, error_msg, receive_count) error_summary = f"Failed after {receive_count} attempts. Temporary errors for all recipients."
mark_as_failed(bucket, key, error_summary, receive_count)
log(f"{'='*70}") log(f"{'='*70}")
log(f"✗ Email delivery failed permanently", 'ERROR') log(f"✗ Email delivery failed permanently after {receive_count} attempts", 'ERROR')
log(f" Error: {error_msg}")
log(f"{'='*70}\n") log(f"{'='*70}\n")
return False # Nach 3 Versuchen → automatisch DLQ return False # Nach 3 Versuchen → automatisch DLQ