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[resolved] SMTP problem - Client host rejected & cannot use authentication
Hi - The system log is showing errors for email sending with the following text:
"Unable to email via SMTP::587  Failed to add recipient: [SMTP: Invalid response code received from server (code: 554, response: 5.7.1 : Client host rejected: Access denied)] "
I thought the issue might be not using authentication in the SMTP settings for the email address, but when I try to set Authentication Required to 'Yes' and save, I get the error "Unable to log in. Check SMTP settings." - The thing is, the SMTP settings I'm using are the same as those I use in Thunderbird, which has no problem sending.
Any help would be appreciated