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[BUG] Error in log output #38

Description

@el97

Bug Description

Today, I noticed that an error kept spamming my log output.

Steps to Reproduce

I don't know what's causing it, and therefore, I don't know how to reproduce it.

Expected Behavior

The log does not contain the issue.

Actual Behavior

The error occurred 472 times within 2 hours.

Environment

  • Home Assistant version: 2025.10.3
  • Integration version: 1.0.7
  • Postal code: 37297
  • Providers enabled: both

Logs

2025-10-23 10:25:11.007 ERROR (MainThread) [homeassistant.helpers.entity] Update for sensor.mail_delivery_37297 fails
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 963, in async_update_ha_state
    await self.async_device_update()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1314, in async_device_update
    await self.async_update()
  File "/config/custom_components/swemail/sensor.py", line 157, in async_update
    newDate = datetime.strptime(nextDelivery, "%Y-%m-%d")
  File "/usr/local/lib/python3.13/_strptime.py", line 789, in _strptime_datetime
    tt, fraction, gmtoff_fraction = _strptime(data_string, format)
                                    ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/_strptime.py", line 555, in _strptime
    raise ValueError("time data %r does not match format %r" %
                     (data_string, format))
ValueError: time data '' does not match format '%Y-%m-%d'

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