587 is AUTHENTICATED submission and should be preferred since more and more providers blocking spam-bots by clsoing outgoing port 25 for homeusers
submission inet n - n - 50 smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject he is NOT requesting to allow relay access, he is requesting ANY access to your smtp-server because he can not use port 25 Am 18.08.2011 14:53, schrieb Carlos Mennens: > 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. 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. > > Thanks for any clarification! -- Mit besten Grüßen, Reindl Harald the lounge interactive design GmbH A-1060 Vienna, Hofmühlgasse 17 CTO / software-development / cms-solutions p: +43 (1) 595 3999 33, m: +43 (676) 40 221 40 icq: 154546673, http://www.thelounge.net/ http://www.thelounge.net/signature.asc.what.htm
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