Plusnet Email servers giving random SMTP 550 errors for inbound emails
@thunderbird6 wrote:
This problem badly affects systems using automated mail. We manage an ecommerce site for one of our clients and PlusNet users frequently don't receive order acknowledgements or confirmations due to Plusnet bouncing them (they are not re-sent).
Are you able to provide us with as much of the below as possible
- Headers
- Bounce back received
- Sender email address
Along with anything else that you think might be helpful and I'll take a look
Thanks, @brianccsw sorry that you're experiencing this, we'd love a sample of your logs and your server address to help us identify the problem (feel free to PM me).
I'm surprised this is taking so long to solve 
Plusnet can surely just spend like a couple quid to register a domain via someone else with whom it is known to fail, setup email forwarding, then start sending test emails to this domain and watch as they randomly fail? Or setup an email client and start sending emails OUT through plusnet from it with the "from" set to a domain, and again watch that randomly fail? That's if it even IS related to forwarding through a domain and not just a more general problem.
The fact the outgoing fails as well as incoming you would think points to some common DNS component failing on both, you wouldnt't even need to buy a domain to test outgoing failing.
It really is worrying how many emails people must be missing due to this?
You can add my domain to the list also experiencing issues. It has been affecting forum notifications for a while as that address is unmonitored, but it was only really brought to my attention today as it is also affecting personal correspondence I was trying to send to a Plusnet user.
Error message
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
xxxxxxx@xxxxxx.plus.com
host mx.avasin.plus.net [212.159.9.200]
SMTP error from remote mail server after MAIL FROM:<xxxxx kitz.co.uk> SIZE=8090:
550 #5.1.8 Domain of sender address <xxxx kitz.co.uk> does not exist
From what I can see, the issue appears to be intermittent, in that it will bounce mail for a few days, then go back to normal, for it then to start happening again a few weeks later.
I'm surprised that you are unable to track this issue down. Plusnet mail users may not be receiving important mail
I just recevied a paper letter today from my bank saying that they'd had to send me it because, though I'm paperless, their attempts to email had bounced. And we know why that is, plusnet randomly bouncing emails forwarded via domains
I had a friend this week say he had tried twice to email me and only the 3rd attempt had made it.
Plusnet have known about this problem for a ridiculously long time now, I see more people complaining about it today, e.g.
https://community.plus.net/t5/Email/Problem-with-emails-forwarded-to-Plusnet-by-123-reg/td-p/1622836
Do they actually have anyone actively looking at it it all? Everyone understands that issues like this might pop up, what is annoying is serious issues like this going on for months and the feeling nothing is getting done about it
Hi @coraledge and @DRWDRW,
Thanks for providing us this information. We're still investigating this issue and will provide a further update once we know more.
