I build a qmail server under a ADSL broadband following the instruction in "Life with qmail".
I don't have a fix IP, so I use a no-ip host name so the server is "cleverchild.no-ip.org" and I create an account "firstname.lastname@example.org".
I can receive mail from all the world and I can send mail to myself (email@example.com send to firstname.lastname@example.org
but when I send mail to other host (e.g. hotmail.com, yahoo.com)using "cleverchild.no-ip.org", the mail stay in the queue forever and the log said "deferral: Sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/"
I read the some post here and found somebody said most ISP have blocked the port 25.(do I correct?)
What should I do to make my qmail server able to send mail to other host?
Thank you very much for your support