Quote:
Originally Posted by shalym
What do you mean? How is Amazon discriminating against port 25? Amazon doesn't care what port you use to send email to their service. Are you saying that you're trying to set up your Kindle to send email? Is this a Kindle Fire? If so, I don't think it's Amazon that is blocking port 25, it's probably whatever Internet provider you're using at the time. I know that my ISP, Cox, blocks port 25 for anything except connections to their own SMTP servers.
Shari
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I was using 'port 25' as a shorthand for 'SMTP connections terminating on Amazon's free.kindle.com servers'.
You will often get connection failures, or one-byte-per-second connections with eventual disconnection, if you connect to retail-smtp-in.amazon.com from anything looking even remotely non-huge-cloud-business: I've seen it from residential ADSL space, small-business IP space and medium-sized-fibre-to-the-premises. gmail? always works. These are not blacklisted addresses I'm talking about
: they're in MX records and receive and send mail to and from many other sites without difficulty (not that mail senders need to be mail recipients as well, but all of these are).