If it works on one system, but you get an error message on another, then it's probably a protocol problem. You might try using Authen::SASL. It's designed so that all protocols can share the connection.

Authen::SASL

For an interesting article on SMTP AUTH, see:

SMTP AUTH in sendmail 8.10-8.13

In reply to Re: Net::SMTP - Authentication Problem by Khen1950fx
in thread Net::SMTP - Authentication Problem by vi_srikanth

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