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Error with outgoing server

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  • Igcine ukuphendulwa ngu Tonnes

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Hi there,

I am unable to send emails. I keep getting a pop up saying "An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: invalid HELO."

How do I fix this?

Hi there, I am unable to send emails. I keep getting a pop up saying "An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: invalid HELO." How do I fix this?

All Replies (1)

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This could indicate that you did not use POP for retrieving messages before trying to send, which is some way of spam prevention at your ISP.

Does it happen after getting email as well? Or are you trying to use a SMTP server without "popping" at their server, e.g. because you disabled automatic retrieval?

Another option would be that your SMTP settings changed in Thunderbird, or your ISP requires authentication where it did not previously (though that would be rare these days.) Make sure "Authentication method" is set to "Normal password" in the SMTP settings, or as provided by the ISP.