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Argomento: SMTP Services - Error 554 Invalid From Address

Post SMTP Services - Error 554 Invalid From Address
di Norman Clark su mercoledì 30 agosto 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
di jdidi su giovedì 31 agosto 2017

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

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Post Re: SMTP Services - Error 554 Invalid From Address
di BrianPinneo su domenica 10 dicembre 2017

I'm having the same issue. My testing so far has only been to gmail email addresses. It looks like gmail is rejecting my email as spam.

I'm using hmailserver with a xxxxx.dynu.com subdomain for mx and relay.dynu.com as a relay server.

I understand that I cannot add spf or dkim records to 3rd level subdomains at dynu.com, which would assist in whitelisting my emails. However, I was previously using a google apps account to relay mail and had no problems (other than I just want to get away from google). Mail was sent and received just fine.

Is this a setup issue by virtue of missing spf and dkim records? Or is gmail refusing to accept mail from relay.dynu.com?

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Post Re: SMTP Services - Error 554 Invalid From Address
di BrianPinneo su domenica 10 dicembre 2017

I just discovered that emails from the domain I registered through the smtp relay service go through fine, but emails from other domains get blocked. I assume this is intentional.

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Post Re: Re: SMTP Services - Error 554 Invalid From Address
di timothytw su domenica 10 dicembre 2017

BrianPinneo wrote:I just discovered that emails from the domain I registered through the smtp relay service go through fine, but emails from other domains get blocked. I assume this is intentional.
Email service is domain name based to prevent spam. If you sign up for the other domains under the same account, you can use the same credentials to relay emails for all 3 domain names.

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Post Re: Re: SMTP Services - Error 554 Invalid From Address
di sbcn2012 su giovedì 18 ottobre 2018

BrianPinneo wrote:I just discovered that emails from the domain I registered through the smtp relay service go through fine, but emails from other domains get blocked. I assume this is intentional.
have the same problem. and only on smart host for 3 domains sending out. ...

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Post Re: SMTP Services - Error 554 Invalid From Address
di mlordmlord su lunedì 4 dicembre 2023

The issue for me with this, was the commandline arguments that Postfix was passing to sendmail -- included the original sender email address as part of those, which is what Dynu was rejecting.

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giovedì 13 giugno 2024 23:15
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