Could be various things, incl 3rd party block, or general mail block by your host or firewall settings of your server, etc.
Hi, thanks for the response. The email sends fine in general, just not in MWZ. I've tried to set it all up as per the guides, but it's still not happening. It gives the right response (check your email verification link or something), but nothing ever arrives. MailWizz is just not sending any email or it's getting blocked somewhere en route (I checked webmail for the domain as well).
Or I have a configuration set up wrongly.
It says inactive, so you need to go to the edit option and do whatever is needed to verify it.When I send an email using my client, it goes through fine. But when I try verifying it fails to send anything, although the verify page looks OK. See image.
If I remember correctly, you need to go to mailgun and validate your part (domain/email). It should tell you in their interface.Hi, well I contacted Mailgun, and they said they had changed IP, but again that has done nothing. So it still isn't working. Sigh.
I've just checked their logs and the email is getting to them (yay!) but then it's getting dropped with this error -
"Failed: firstname.lastname@example.org → email@example.com 'Please validate this server.' Server response: 550 550 Verification failed for <firstname.lastname@example.org> No Such User Here" Sender verify failed"
So I guess it's either at my webhost or at Mailgun?