SMTP Services - Error 554 Invalid From Address SMTP Services - Error 554...

Topic: SMTP Services - Error 554 Invalid From Address

Post SMTP Services - Error 554 Invalid From Address
by Norman Clark on Wednesday, August 30, 2017

I have attempted to send emails using your smtp services but receive the smtp error 554 Invalid From Address.

Although authenticated using my dynu account credentials, my "From" email is nclark@xxxxxxxx.com which is a valid email account not hosted on the dynu domain. If the "From" address is changed to a dynu.com hosted email account then the mail is sent properly.

Is this some sort of protocol that you have put in place to prevent spam being sent from your domain?

I have a demo software application that needs to send email using a known email account that is not visible to the users. It will use the authenticated dynu account smtp services but the "From" email address will not be a dynu email account.

How can I get around this issue/restriction?

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Post Re: SMTP Services - Error 554 Invalid From Address
by jdidi on Thursday, August 31, 2017

'554 Invalid From Address' looks like an anti-spam protocol on the server end like you mentioned.

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Wednesday, November 22, 2017 12:20 AM