topic Re: Cannot send email to anyone, even myself in Email

Cannot send email to anyone, even myself

PeterB1 — Sat, 23 Aug 2025 15:25:00 GMT

When I went to bed last night, all was well with my Plusnet email (send and receive), including instant delivery to Gmail addresses which have been problematical recently

Needless to say, nothing has changed with my account or server settings etc overnight!

This morning, incoming emails are arriving OK, but I cannot send an email to anyone, even myself, from Outlook, webmail or iPhone Mail.

On webmail, the error message reads: "

SMTP error (550) Failed to set <redacted> sender rejected (blacklisted by local policy

On Outlook, the error is:

! Task ‘<redacted>.plus.com – Sending reported error Ox800CCC78: ‘Cannot send the message. Verify the email address in your account properties. The server responded 550 <redact .plus.com> sender rejected (blacklisted by local policy)

On iPhone the error is:

Cannot send mail. The sender address was invalid.

As nothing on my system has changed, I don't understand how the sender address (i.e. my usual Plusnet email address) can suddenly be invalid!

Even when I'm sending a message to myself!

HELP!

Moderator's note:
Personal information removed from a public forum (to an area that staff can see).

Re: Cannot send email to anyone, even myself

jab1 — Sat, 23 Aug 2025 10:43:35 GMT

@PeterB1 See my reply to the same post in the other topic.

Re: Cannot send email to anyone, even myself

PeterB1 — Sat, 23 Aug 2025 10:44:37 GMT

Many thanks, John.

Very glad I'm not alone!

Re: Cannot send email to anyone, even myself

CSG — Sat, 23 Aug 2025 12:09:33 GMT

Having received exactly the same message, following the failure of my outgoing emails to leave the Outbox this morning, and ~ having spent a couple of hours searching for problems within my system ~ I'm slightly relieved to find that the issue seems to be with Plusnet.

Having said that, when will it be resolved ?

Re: Cannot send email to anyone, even myself

jab1 — Sat, 23 Aug 2025 12:12:01 GMT

@CSG wrote:

Having said that, when will it be resolved ?

When it gets sorted - your question is one of those 'how long is a piece of string?' ones.

Re: Cannot send email to anyone, even myself

paul-palace — Sat, 23 Aug 2025 12:25:58 GMT

My mail has just started working again - could not send anything - email address invalid message.
Ok now 13:25.
Downdetector shows plusnet outages.

Re: Cannot send email to anyone, even myself

Joy3 — Sat, 23 Aug 2025 12:26:50 GMT

I have the same problem, Peter!

Re: Cannot send email to anyone, even myself

Joy3 — Sat, 23 Aug 2025 12:29:06 GMT

Hi JOhn, I've just joined, how do I see your reply, please?

Re: Cannot send email to anyone, even myself

jab1 — Sat, 23 Aug 2025 12:32:56 GMT

@Joy3 Which one?

Re: Cannot send email to anyone, even myself

Joy3 — Sat, 23 Aug 2025 12:59:45 GMT

Hi John, thanks for the reply, was just trying to see if you'd referred to the blacklist problem! I can't send emails today::(

Re: Cannot send email to anyone, even myself

Townman — Sat, 23 Aug 2025 13:03:24 GMT

Try again.

Re: Cannot send email to anyone, even myself

Joy3 — Sat, 23 Aug 2025 13:05:37 GMT

THanks, it's ok now!!

Re: Cannot send email to anyone, even myself

Baldrick1 — Sat, 23 Aug 2025 14:31:31 GMT

Moderator's note:

Topic locked as the problem is resolved. Any further comments should be added to this related topic:

https://community.plus.net/t5/Email/Plusnet-emails-refusing-to-send/m-p/2018064#M52122