29-09-2022 05:18 PM
Hello,
Recently I converted my homes broadband to a 4G mobile broadband package.
Since moving over three weeks ago I have experienced on multiple occasions my public IP address being blocked by Spamhaus spam email filtering. This has meant I am unable to send emails on my network from Outlook. When trying to send an email I receive the bounce back
"Server error: '554 5.7.1 Service unavailable; Client host [---.---.---.---] blocked using sbl.spamhaus.org; https://www.spamhaus.org/sbl/query/SBLCSS'"
If I restart my 4G router to receive a new public IP address I am able to then able to successfully send emails.
Although I have this solution, having to restart my network to be able to send emails is very annoying! Why does it appear lots of EE public IP addresses are blocked by spam email protection services..? This nuisance is ruining the service and I am thinking of returning to traditional landline broadband. I did contact EE 'technical' support by phone but they told me they don't "offer all that dynamic IPs and addresses and stuff"... when I tried to explain the situation.
13-02-2023 01:45 PM
@XRaySpeX ...which is why you're able to send e-mail from a mobile connection with no trouble.
13-02-2023 01:53 PM
@grsdev : Yes, but is there any reason why the OP is not doing similar & not your obscure method, particularly as he is using OL to send, which deals in SMTPs?
13-02-2023 02:01 PM
If OP was using their provider's SMTP service, the IP address showing as being blocked would be that of the provider's outbound relay, not OP's own IP address, because the provider's outbound relay would be the one attempting to relay the e-mail to the recipient's MX.
SMTP is an application protocol. What's in question here is the routing of e-mail, not the application protocol used to transmit e-mail from one relay to another.