Some emails bouncing with 450 4.7.1 error

A

Alvin63

Well-known member
This happens once a week when the weekly newsletter goes out. About 12 emails to 12 members bounce with this error and come up as a server error. I only have about 250 members at the moment, so won't be exceeding the email quota (I think). I noticed the IP address is an IPV6 one. Any ideas? I'm wondering if they're all gmail addresses and google doesn't like something. I have DMarc, SPF and DKIM set up via cloudflare.

Edit it shows the email addresses in the server error - they're not all gmail - there's a whole range of email providers in there: gmail, hotmail, icloud, yahoo.
 
Last edited:
Alvin63 said:
This happens once a week when the weekly newsletter goes out. About 12 emails to 12 members bounce with this error and come up as a server error. I only have about 250 members at the moment, so won't be exceeding the email quota (I think). I noticed the IP address is an IPV6 one. Any ideas? I'm wondering if they're all gmail addresses and google doesn't like something. I have DMarc, SPF and DKIM set up via cloudflare.

Edit it shows the email addresses in the server error - they're not all gmail - there's a whole range of email providers in there: gmail, hotmail, icloud, yahoo.
Click to expand...

Just to add that I use gmail and I received your newsletter earlier today :)
 
What email provider are you using to send emails?

450 4.7.1 errors are related to reputation - the receiving servers are rejecting your emails because your sending reputation is bad.
 
It’s outsourced by the server. Had an issue once before when the IP for the email service was on a blacklist but they changed the IP when I told them. Checked the IP and it’s not on any blacklists. The error says something like recipients inbox full.
 
Using your hosting providers SMTP server is never a good idea these days - it is shared with all the other senders using that provider and you can almost guarantee that some of the users are abusing email sending - either deliberately or because they don't know what they are doing.

You really should use a dedicated Email Service Provider (ESP), to send emails - otherwise you're going to keep having deliverability problems.
 
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