On 20/09/2018 21.33, James Knott wrote:
On 09/20/2018 09:19 PM, Carlos E. R. wrote:
Certainly. In Spain sometimes I also use ONO, now owned by Vodaphone. No issues using 25.
Were you able to use port 25 between ISPs? IIRC, my ISP no longer even allows clients to connect on 25. Only on 465. I don't know if they'll allow 587, but suspect they may.
Certainly. I sometimes use ONO network sending telefonica.net mail, I have been doing it for years. The reverse I have not tried, because ONO does not provide mail accounts for new clients. For a few months I also used another temporary provider via mobile dongle, I don't remember which name. Years before I used Tiscali email in the same manner, port 25 with postfix (I can see it because the config file still exists) via modem from Telefonica network. I have other mail providers which I have used via 25, one for years and another since this summer, from Telefónica network. Oh, three, gmail is another. Postfix by default uses 25, so... Certainly, when doing autoconfiguration with Thunderbird it chooses submission ports. But as on postfix I have never specified ports, it has always used 25.
I just tried using telnet to connect to the ports. 465 & 587 connect, but 25 doesn't.
As you can see in my log entries, I can't connect to submission ports on telefonica.net servers. They do not support them, and have not answered my query on the support forum. -- Cheers / Saludos, Carlos E. R. (from openSUSE 15.0 (Legolas))