So there was some controversy decades ago the past about John Gilmore's public open SMTP relay server. I wondered if it still existed.
It does!
benc@dogger:~$ telnet new.toad.com 25 Trying 209.237.225.253... Connected to new.toad.com. Escape character is '^]'. 220 new.toad.com ESMTP Sendmail 8.12.9/8.12.9; Sun, 5 Mar 2017 08:12:44 -0800 EHLO dogger.cqx.ltd.uk 250-new.toad.com Hello dynamic-91.hawaga.org.uk [90.155.94.91] (may be forged), pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-8BITMIME 250-SIZE 89000000 250-DSN 250-ETRN 250-AUTH GSSAPI 250-STARTTLS 250-DELIVERBY 250 HELP MAIL FROM:benc@hawaga.org.uk 250 2.1.0 benc@hawaga.org.uk... Sender ok RCPT TO:benc@hawaga.org.uk 250 2.1.5 benc@hawaga.org.uk... Recipient ok DATA 354 Enter mail, end with "." on a line by itself Subject: test 1 test . 250 2.0.0 v25GCiXw019546 Message accepted for delivery 221 2.0.0 new.toad.com closing connection
Return-Path:Received: from new.toad.com (new.toad.com [209.237.225.253]) by smtp-in.biscay.cqx.ltd.uk (8.14.4/8.14.4/Debian-2ubuntu2.1) with ESMTP id v25F9dpo009917 for <benc@hawaga.org.uk>; Sun, 5 Mar 2017 15:09:40 GMT Received: from dogger.cqx.ltd.uk (dynamic-91.hawaga.org.uk [90.155.94.91] (may be forged)) by new.toad.com (8.12.9/8.12.9) with ESMTP id v25F96Xw016104 for benc@hawaga.org.uk; Sun, 5 Mar 2017 07:09:28 -0800 Date: Sun, 5 Mar 2017 07:09:06 -0800 From: benc@hawaga.org.uk Message-Id: <201703051509.v25F96Xw016104@new.toad.com> Subject: test 1