Can't send email due to QSMTPPUT: 654,0, what to do?

Hello, this might not be the right place, but I have a SunTek 810G camera, and it can’t send emails via SMTP. I always get QSMTPPUT: 654,0 response.

After Googling, I found it means:

Network error, such as failed to activate GPRS/CSD context, failed to establish the
TCP connection with the SMTP server or failed to send an email to the SMTP
server, etc.

Here’s the log:

2023/03/28 18:55:03 : ATI
2023/03/28 18:55:04 : ATI
2023/03/28 18:55:04 : ATI
2023/03/28 18:54:53 : ATI
2023/03/28 18:54:53 : Ver:800 10/20/2020
2023/03/28 18:54:54 : ATI
2023/03/28 18:54:54 : ATI
2023/03/28 18:54:55 : ATI
2023/03/28 18:54:55 : ATI
2023/03/28 18:54:56 : ATI
2023/03/28 18:54:57 : ATI
2023/03/28 18:54:57 : RDY
2023/03/28 18:54:58 : ATI
2023/03/28 18:54:58 : ATI
2023/03/28 18:54:58 : Quectel
2023/03/28 18:54:59 : EC200T
2023/03/28 18:54:59 : Revision: EC200TEUHAR03A03M16_BETA0929
2023/03/28 18:54:59 : OK

2023/03/28 18:54:59 : +CPIN: READY
2023/03/28 18:54:59 : +QUSIM: 1
2023/03/28 18:55:00 : +QIND: SMS DONE
2023/03/28 18:55:00 : +CFUN: 1
2023/03/28 18:55:00 : AT+QCFG="nwscanmode",0,1
2023/03/28 18:55:00 : OK

2023/03/28 18:55:02 : AT+QCFG="risignaltype","physical"
2023/03/28 18:55:03 : AT+GSN
2023/03/28 18:55:04 : 865334041604452
2023/03/28 18:55:04 : OK

2023/03/28 18:55:04 : +QIND: PB DONE
2023/03/28 18:55:05 : AT+ICCID
2023/03/28 18:55:06 : +ICCID: 89381030000311731394
2023/03/28 18:55:06 : OK

2023/03/28 18:55:07 : AT+IFC=2,2
2023/03/28 18:55:07 : OK

2023/03/28 18:55:09 : AT+CSQ
2023/03/28 18:55:09 : +CSQ: 29,99
2023/03/28 18:55:09 : OK

2023/03/28 18:55:11 : AT+CREG?
2023/03/28 18:55:11 : +CREG: 0,1
2023/03/28 18:55:11 : OK

2023/03/28 18:55:12 : AT+COPS?
2023/03/28 18:55:13 : +COPS: 0,0,"mt:s",7
2023/03/28 18:55:13 : OK

2023/03/28 18:55:14 : AT+QNWINFO=?
2023/03/28 18:55:15 : OK

2023/03/28 18:55:16 : AT+QNWINFO
2023/03/28 18:55:16 : +QNWINFO: "FDD LTE","22003","LTE BAND 20",6200
2023/03/28 18:55:17 : OK

2023/03/28 18:55:18 : AT+CIMI
2023/03/28 18:55:18 : 220032601471266
2023/03/28 18:55:18 : OK

2023/03/28 18:55:20 : AT+CSQ
2023/03/28 18:55:20 : +CSQ: 28,99
2023/03/28 18:55:20 : OK

2023/03/28 18:55:20 : AT+CGREG?
2023/03/28 18:55:21 : +CGREG: 0,1
2023/03/28 18:55:21 : OK

2023/03/28 18:55:21 : AT+COPS?
2023/03/28 18:55:21 : AT+IFC=2,2
2023/03/28 18:55:21 : +COPS: 0,0,"mt:s",7
2023/03/28 18:55:21 : OK

2023/03/28 18:55:21 : AT+QSMTPCLR
2023/03/28 18:55:22 : OK

2023/03/28 18:55:22 : AT+QIDEACT=1
2023/03/28 18:55:22 : OK

2023/03/28 18:55:22 : AT+QFDEL="*"
2023/03/28 18:55:22 : OK

2023/03/28 18:55:22 : AT+CIMI
2023/03/28 18:55:23 : 220032601471266
2023/03/28 18:55:23 : OK

2023/03/28 18:55:23 : AT+QICSGP=1,1,"gprswap","mts","064",1
2023/03/28 18:55:23 : OK

2023/03/28 18:55:23 : AT+QIACT=1
2023/03/28 18:55:24 : OK

2023/03/28 18:55:24 : AT+QSMTPCFG="contextid",1
2023/03/28 18:55:24 : OK

2023/03/28 18:55:24 : AT+QSMTPCFG="ssltype",0
2023/03/28 18:55:25 : OK

2023/03/28 18:55:25 : AT+QSMTPCFG="smtpserver","smtp.hichina.com",25
2023/03/28 18:55:25 : OK

2023/03/28 18:55:25 : AT+QSMTPCFG="account","smtptest@cnsuntek.com","******"
2023/03/28 18:55:25 : OK

2023/03/28 18:55:26 : AT+QSMTPCFG="sender","smtptest","smtptest@cnsuntek.com"
2023/03/28 18:55:26 : OK

2023/03/28 18:55:26 : AT+QSMTPDST=1,1,"myemailadress@gmail.com"
2023/03/28 18:55:26 : AT+QSMTPSUB=0,"CAM000_PICT_20230328_1855.jpg"
2023/03/28 18:55:27 : OK

2023/03/28 18:55:27 : AT+QSMTPBODY=0,56,10
2023/03/28 18:55:27 : CONNECT
2023/03/28 18:55:27 : +QSMTPBODY: 56
2023/03/28 18:55:27 : OK

2023/03/28 18:55:27 : AT+QFUPL="PICT_20230328_1855.jpg",65899
2023/03/28 18:55:28 : CONNECT
2023/03/28 18:55:47 : +QFUPL: 65899,2b65
2023/03/28 18:55:47 : OK

2023/03/28 18:55:47 : AT+QSMTPATT=1,1,"UFS:PICT_20230328_1855.jpg"
2023/03/28 18:55:47 : OK

2023/03/28 18:55:47 : AT+QSMTPPUT=800
2023/03/28 18:55:48 : OK

2023/03/28 18:55:56 : +QSMTPPUT: 654,0
2023/03/28 18:55:56 : AT+QFDEL="*"
2023/03/28 18:55:56 : OK

2023/03/28 18:55:56 : AT+QSCLK=1
2023/03/28 18:55:57 : OK

Can someone please explain to me how can I deal with this issue?

May I know ,which module has been used in this case ?

After checking the error log, all I found is this:

EC200T
EC200TEUHAR03A03M16_BETA0929

Hope this can help you identify it.