Error message for a specific email domain

Erixis1

I have a joomla site, all in current up to date versions and using Acymailing ver 6.10.4

We've had the site up over a year, and using Acymailing to send out newsletters and notices with no problem.
Last week, the site owner started getting an error when he would test sending a newsletter to his email account, which has been working up to this point.
The error is as follows:
Error sending message APCAA Newsletter: Upcoming webinar and "A Minute With Faculty Members" to user@domain.org , , , (user@domain.org: User does not exist ) SMTP server error: Called RSET without being connected

I checked and the email accounts are listed as users in our joomla setup and they are activated and enabled, and have been working prior to this point.

I've never seen this error before from Acymailing. We sent the newsletter out, and all recipients in the group with that domain threw the same error.

I've checked the mx settings for the domain and they all report back normal, and they are all getting and sending email from their accounts.

I turned off email validation in the settings in Acymailing but that didn't stop the error.

I'm not sure where to trouble shoot this. On our server, in the Acymailing system, or have their techs look at their mx settings.

jvstratum

Hi,

This is not about your Joomla user but about the actual mailbox that doesn't exist (anymore). You can check for your self with an online mail validation check tool like https://verifalia.com/validate-email.

Erixis1

jvstratum, Thanks for the reply. Using verifalia I get the following summary for the actual email address in question, which I'm redacting in this thread.

Validation summary

Classification:
Risky
Status:
Risky email type, the external mail exchanger accepts fake and non-existent e-mail addresses; therefore the provided e-mail address MAY not exist. The existence of the individual mailbox cannot be verified.

So I suppose that is why the error message is occuring, but is Acymailing refusing to send to email addresses on that mx system? The client's email is working otherwise. It looks like their IT squad just doesn't have their mx rules set up tight enough, but as far as I know, its been that way for years and we haven't been getting this error from Acymailing.

jvstratum

Hi,

The issue is definitly your clients mail server.

Erixis1

I'm trying to help the systems IT folks understand why we can't distribute emails sent to their domain because of this error.
Can I get clarification that the reason Acymailng won't send to these email addresses at this domain is because it is set up to automatically refuse to sent to an unverifiable email address?

I noticed from Verfalia they are now offering more information on their verification report, and indicating that the mailserver we're trying to send to is set as a catchall server, and therefore it will not verify that ANY email address is valid and just accepts all?

Am I correct in the above statement ?