topic Error 550 5.4.300 Message expired in Email and hosting

Error 550 5.4.300 Message expired

pamelapuk — Sun, 13 Jul 2025 16:58:39 GMT

I am using my BT account to send emails - my account is btconnect with a btclick alias and I am using Thunderbird with OWL (https://www.beonex.com/owl/) (OWL sends as an Office365 email account)

to send. I send to a list of email addresses and every one receives the email except for two blueyonder users. Blueyonder returns an error 550 5.4.300 Message expired. I thought it might be a case of needing to be whitelisted but apparently blueyonder don't have whitelists. In any case, I can't see why blueyonder would object to valid BT addresses. Is there anything I can do to get blueyonder to accept my emails? Blueyonder is now Virgin Media.

Re: Error 550 5.4.300 Message expired

BethM — Mon, 14 Jul 2025 11:33:02 GMT

Hi pamelapuk

You will need to contact the provider of these email addresses.

Re: Error 550 5.4.300 Message expired

pamelapuk — Tue, 02 Sep 2025 04:57:45 GMT

Hi Beth

I have tried and tried to get Virgin to accept btconnect.com via Outlook emails. They just keep refusing to even look at it as I don't have an account with them. Other people have complained about it and got nowhere with Virgin either. Since the email address btconnect.com is a perfectly valid BT business email address I cannot see why BT and Virgin cannot sort this out between them.

Re: Error 550 5.4.300 Message expired

BethM — Thu, 04 Sep 2025 11:00:56 GMT

Hi pamelapuk

Can you please send me over a private message so we can discuss this further? Thanks