* Carlos Mennens <carlosw...@gmail.com>: > Today I received a ticket for altering the way my Postfix server > handles mail and I don't understand it. The ticket / request is pasted > below: > > ********************************************** > According to RFC 4409 client mail submission to an email server is > supposed to use port 587. > Server to server SMTP relays are to use port 25. > When I am not at the office, I can't email via my work (Postfix) > account via my iphone or my residential internet because my ISP(s) > filter port 25 to only allow traffic to and from their mail servers. > They do however allow 587 anywhere per RFC 4409. > Additionally I can't email to the IDE with my gmail account, this is > becoming a real pain in the ass when I need to send emails with > attachments. > Just to send this email I am having to relay off my own server in California. > Can we please get the proper ports opened on the mail server? > > http://www.ietf.org/rfc/rfc4409.txt > ********************************************** > > Now my question is I just want to be sure I'm correct in assuming that > all mail servers send on port 25, correct? This user just is > requesting me to allow relay access from his phone carriers network or > home ISP which I'm not going to do since this is the reason I manage > webmail for users.
Is he able to relay via port 25 now? > Does the above request seem legit or strange? I don't know enough about > Postfix / mail & port 587 to know if this is a legit request. Legit request. Like he said, he cannot reach port 25, so 587 (submission) is the preferred option. -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de
