503 5.5.0 Need MAIL before RCPT

[DreamingBewilderedly]

Good evening, i'm getting right to the point. I'm from Argentina, and the carrier of my phone (Where i'm testing the tool) is "Personal" SMTP: [email protected].
Your tool shows the message "sent" when i execute the script, but, I get an error in Gmail (The one stated in the title) and my text does not arrive the recipient. I hope you can provide some insight so I could fix the issue.

Error:
Final-Recipient: rfc822; (number)@alertas.personal.com.ar
Action: failed
Status: 5.5.0
Remote-MTA: dns; alertas.personal.com.ar (200.43.139.178, the server for the domain.)
Diagnostic-Code: smtp; 503 5.5.0 Need MAIL before RCPT
Last-Attempt-Date: Sat, 24 Jun 2017 21:51:06 -0700 (PDT)

Thanks!

[jdleo]

Sorry for the late reply, I will find a solution to this right now. Thanks for checking out my repo!

[jdleo]

Are you using the python script, or the java version?

[DreamingBewilderedly]

No problem haha. I'm using Kali Linux with the Python script

[DreamingBewilderedly]

I'm sure it's not your tool specifically. I've tried a couple and i get the same error, but you were kind enough to reply. I hope you can help me.

[5ubz]

John, thank you so much for providing such an easy to use tool. However, I am experiencing the same issue as DramingBewilderedly did. I'm using Windows 10 Pro x64 and the python script.

I have tried sending from different mail domains: gmail and mail.com. I've also tried sending a single text as well as several and have tried different wait times for sending (last line of #CONFIG). I keep getting NDRs for each one. When I send directly from Gmail or mail.com, it works.

Thanks for any help you are willing to provide :)