I'm moving so am without ADSL for a while. I'm using a Three PAYG mobile broadband connection for now but can't seem to send email via SMTP. Trying to send via any of four SMTP services I should have access to I can't connect, so assume that Three filter port 25 (don't get replies from SYN packets).
Three's web site says to use smtp-mbb.three.co.uk port 587. That server doesn't reply on port 587, but does accept email sent on port 25. Using Wireshark I can see the SMTP transaction completes correctly. However...an email I sent at 09:28 hasn't arrived come midday.
Has anyone else got a working way to send email using Three's mobile broadband service?
Gawd...my first day without a proper ISP and I already want to get back into bed and read a book!