So here is where we are at. Your SMTP setup is refusing to send emails if the To contains a comma separated list of email addresses, which is how we send to multiple recipients. This is why it is failing on multiple but working on one.
If you go to this page here in your admin:
At the very bottom of that page is a "Send a Test Email" form. If you enter a single email address and run the test it works, if you enter a comma separated list it fails. This is highly unusual as just like with your email client you should be able to send email to a comma separated list of addresses.
If you test it using that test form and enter a comma separated list of emails you will see it return a really long results message, at the bottom of that message is this error:
SMTP -> ERROR: RCPT not accepted from server: 501 5.1.3 Bad recipient address syntax
We haven't encountered this before and it appears to be due to how your SMTP server handles email that contains multiple recipients. It might be some sort of localization issue. How do you send email to multiple recipients in hebrew? Do you use a comma to separate them in the email client?
Posted 10 years ago on Thursday July 8, 2010 | Permalink