iO Exception

[Dave181295]

I got the callback with IO exception while sending message

this is log :

2021-01-15 05:19:12.558 9599-9599/com.olivier.oplivre W/System.err: javax.mail.MessagingException: IOException while sending message; 2021-01-15 05:19:12.558 9599-9599/com.olivier.oplivre W/System.err: at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1308) 2021-01-15 05:19:12.558 9599-9599/com.olivier.oplivre W/System.err: at javax.mail.Transport.send0(Transport.java:255) 2021-01-15 05:19:12.558 9599-9599/com.olivier.oplivre W/System.err: at javax.mail.Transport.send(Transport.java:124) 2021-01-15 05:19:12.558 9599-9599/com.olivier.oplivre W/System.err: at com.creativityapps.gmailbackgroundlibrary.util.GmailSender.sendMail(GmailSender.java:114) 2021-01-15 05:19:12.558 9599-9599/com.olivier.oplivre W/System.err: at com.creativityapps.gmailbackgroundlibrary.BackgroundMail$SendEmailTask.doInBackground(BackgroundMail.java:273) 2021-01-15 05:19:12.558 9599-9599/com.olivier.oplivre W/System.err: at com.creativityapps.gmailbackgroundlibrary.BackgroundMail$SendEmailTask.doInBackground(BackgroundMail.java:248) 2021-01-15 05:19:12.559 9599-9599/com.olivier.oplivre W/System.err: at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1652) 2021-01-15 05:19:12.559 9599-9599/com.olivier.oplivre W/System.err: at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:961) 2021-01-15 05:19:12.559 9599-9599/com.olivier.oplivre W/System.err: at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:553) 2021-01-15 05:19:12.559 9599-9599/com.olivier.oplivre W/System.err: at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:81) 2021-01-15 05:19:12.559 9599-9599/com.olivier.oplivre W/System.err: at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1652) 2021-01-15 05:19:12.559 9599-9599/com.olivier.oplivre W/System.err: at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1850) 2021-01-15 05:19:12.559 9599-9599/com.olivier.oplivre W/System.err: at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1259)