Hi, I have a camera application on a custom-designed ESP32S3, now using your book “send photo with email new” code, I get the 
“Guru Meditation : Core 0 panic’ed (LoadStoreError). Exception was unhandled.” error.

Detail:
ESP-ROM:esp32s3-20210327
mode:DIO, clock div:1
load:0x3fce3808,len:0x39c
load:0x403c9700,len:0x9bc
load:0x403cc700,len:0x28dc
SHA-256 comparison failed:
Calculated: 9477899d59fa5164e630d8218cb3994031873358e9105b31f53911d2dfd36c72
Expected: ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
Attempting to boot anyway…
entry 0x403c98c0
[ 261][D][esp32-hal-cpu.c:214] setCpuFrequencyMhz(): PLL: 480 / 6 = 80 Mhz, APB: 80000000 Hz
[ 261][I][esp32-hal-psram.c:96] psramInit(): PSRAM enabled
[ 333][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 0 – WIFI_READY
[ 389][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 2 – STA_START
Connecting to WiFi…[ 549][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 4 – STA_CONNECTED
.[ 1168][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 7 – STA_GOT_IP
[ 1169][D][WiFiGeneric.cpp:991] _eventCallback(): STA IP: 192.168.0.100, MASK: 255.255.255.0, GW: 192.168.0.1
.
SPIFFS mounted successfully
IP Address: http://192.168.0.100
Taking a photo…
Picture file name: /photo.jpg
The picture has been saved in /photo.jpg – Size: 77824 bytes
Connecting to SMTP server…
> C: ESP Mail Client v2.4.8
> C: Wait for NTP server time synching
Guru Meditation Error: Core 0 panic’ed (LoadStoreError). Exception was unhandled.

I think it is a buffer issue; https://docs.espressif.com/projects/esp-idf/en/v4.2/esp32/api-guides/fatal-errors.html#loadprohibited-storeprohibited
My board is ESP32S3 with 16MB flash and for PSRAM I use OPIRAM and ESP32S3 Dev module in Arduino IDE.
Should I provide a specific address for the buffer instead of a NULL pointer? Is it a new issue in ESP32-Arduino 2 core?

Thank you for your great content on random nerd website, Btw, If you migrate your espcam book codes to Arduino 2.0 that will be more useful.
Best,
Iman