ESP_Mail_Session Global

[hall1235]

Hello mobizt

I set the ESP_Mail_Session to Global variable and try to send the email every 20 seconds. but It send only 2 time, after that not send anymore.

Is it normal ?

Window 10
Arduino IDE Version 1.8.19
Board : ESP32 Dev module
Board Manager version Esp32 : 2.0.5
Partition scheme : NO OTA 2MB APP/2MB SPIFFS
Library version 2.5.2

Code

void smtpCallback(SMTP_Status status);

SMTPSession smtp;
ESP_Mail_Client SdEmail;
ESP_Mail_Session session;
SMTP_Message message;

unsigned long time_ms = false;

void setup()
{

Serial.begin(115200);
Serial.print("Connecting Internet");

WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(200);
}

Serial.println();
Serial.println("WiFi connected.");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
Serial.println();

smtp.debug(1);
smtp.callback(smtpCallback);
session.server.host_name = SMTP_HOST;
session.server.port = SMTP_PORT;
session.login.email = AUTHOR_EMAIL;
session.login.password = AUTHOR_PASSWORD;
session.login.user_domain = F("mydomain.net");

session.time.ntp_server = F("pool.ntp.org,time.nist.gov");
session.time.gmt_offset = 7;
session.time.day_light_offset = 0;

message.enable.chunking = true;

message.sender.name = F("TEST");
message.sender.email = AUTHOR_EMAIL;

message.subject = F("Esp32 Sending data");

message.addRecipient(F("user1"), F("[email protected]"));

String htmlMsg = "<span style="color:#ff0000;">This message contains 1 inline image and 1 attachment file.

<img src="orange.png" width="100" height="100">";
message.html.content = htmlMsg;
message.html.charSet = F("utf-8");

message.html.transfer_encoding = Content_Transfer_Encoding::enc_qp;
message.text.content = F("This message contains 1 inline image and 1 attachment file.\r\nThe inline images were not shown in the plain text message.");
message.text.charSet = F("utf-8");
message.text.transfer_encoding = Content_Transfer_Encoding::enc_base64;
message.priority = esp_mail_smtp_priority::esp_mail_smtp_priority_normal;

if (!smtp.connect(&session)) return;

if ( !MailClient.sendMail(&smtp, &message ) )
Serial.println("Error sending Email, " + smtp.errorReason());

ESP_MAIL_PRINTF("Free Heap: %d\n", MailClient.getFreeHeap());

time_ms = millis() + 20000;
}

void loop()
{
if ( millis() > time_ms ) {
time_ms = millis() + 20000;
while (!smtp.connect(&session)) {
delay(1000 );
Serial.println( "Session not connected" );
}
!MailClient.sendMail(&smtp, &message);
ESP_MAIL_PRINTF("Free Heap: %d\n", MailClient.getFreeHeap());
}
}

void smtpCallback(SMTP_Status status)
{
Serial.println(status.info());
if (status.success())
{
Serial.println("----------------");
ESP_MAIL_PRINTF("Message sent success: %d\n", status.completedCount());
ESP_MAIL_PRINTF("Message sent failled: %d\n", status.failedCount());
Serial.println("----------------\n");
struct tm dt;

for (size_t i = 0; i < smtp.sendingResult.size(); i++)
{
  SMTP_Result result = smtp.sendingResult.getItem(i);
  time_t ts = (time_t)result.timestamp;
  localtime_r(&ts, &dt);

  ESP_MAIL_PRINTF("Message No: %d\n", i + 1);
  ESP_MAIL_PRINTF("Status: %s\n", result.completed ? "success" : "failed");
  ESP_MAIL_PRINTF("Date/Time: %d/%d/%d %d:%d:%d\n", dt.tm_year + 1900, dt.tm_mon + 1, dt.tm_mday, dt.tm_hour, dt.tm_min, dt.tm_sec);
  ESP_MAIL_PRINTF("Recipient: %s\n", result.recipients.c_str());
  ESP_MAIL_PRINTF("Subject: %s\n", result.subject.c_str());
}
Serial.println("----------------\n");
smtp.sendingResult.clear();

}
}

Thank you so much mobizt.

[mobizt]

I can't see any sending result from your post which I can't tell anything or help.

[mobizt]

I'm investigating this issue and will update soon.

[hall1235]

Thank you so much.

[mobizt]

The library v2.5.3 with the issue fixed is available.

Please update.