Can MTA send mail via a relay without being told so? The Next CEO of Stack Overflowrelay mail from one postfix server to anotherZimbra doesn't send mail via smtp relay anmorePostfix: 'Relay access denied' - all incoming mail is rejectedSetting up SPF and initial questionsUsing SPF for spoof protectionCan't send mail from own server to GoogleAllowing a partially trusted server to send mail for one given address via SPF / DKIMSPF with -all includes directive with ~all?Setting SPF record for mail relay servers to avoid softfailSPF setup for mail and relay server

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Can MTA send mail via a relay without being told so?



The Next CEO of Stack Overflowrelay mail from one postfix server to anotherZimbra doesn't send mail via smtp relay anmorePostfix: 'Relay access denied' - all incoming mail is rejectedSetting up SPF and initial questionsUsing SPF for spoof protectionCan't send mail from own server to GoogleAllowing a partially trusted server to send mail for one given address via SPF / DKIMSPF with -all includes directive with ~all?Setting SPF record for mail relay servers to avoid softfailSPF setup for mail and relay server










2















I'm thinking of adding an SPF to a domain. So I'm concerned if there are circumstances under which my MTA would use some relay when sending mail. Like, when the destination servers are too busy or something? I'm mainly interested in postfix's or exim's default settings.










share|improve this question


























    2















    I'm thinking of adding an SPF to a domain. So I'm concerned if there are circumstances under which my MTA would use some relay when sending mail. Like, when the destination servers are too busy or something? I'm mainly interested in postfix's or exim's default settings.










    share|improve this question
























      2












      2








      2








      I'm thinking of adding an SPF to a domain. So I'm concerned if there are circumstances under which my MTA would use some relay when sending mail. Like, when the destination servers are too busy or something? I'm mainly interested in postfix's or exim's default settings.










      share|improve this question














      I'm thinking of adding an SPF to a domain. So I'm concerned if there are circumstances under which my MTA would use some relay when sending mail. Like, when the destination servers are too busy or something? I'm mainly interested in postfix's or exim's default settings.







      email postfix exim spf






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 6 hours ago









      x-yurix-yuri

      411715




      411715




















          2 Answers
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          No, if you don’t configure any relay (and don’t fiddle around on the network layer) , an MTA will try to deliver to whatever DNS says should get the mail.






          share|improve this answer






























            2















            I'm concerned if there are circumstances under which my MTA would use
            some relay when sending mail.




            No. Your server will attempt to send email to the MX record(s) for the destination domain.






            share|improve this answer























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              2 Answers
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              active

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              3














              No, if you don’t configure any relay (and don’t fiddle around on the network layer) , an MTA will try to deliver to whatever DNS says should get the mail.






              share|improve this answer



























                3














                No, if you don’t configure any relay (and don’t fiddle around on the network layer) , an MTA will try to deliver to whatever DNS says should get the mail.






                share|improve this answer

























                  3












                  3








                  3







                  No, if you don’t configure any relay (and don’t fiddle around on the network layer) , an MTA will try to deliver to whatever DNS says should get the mail.






                  share|improve this answer













                  No, if you don’t configure any relay (and don’t fiddle around on the network layer) , an MTA will try to deliver to whatever DNS says should get the mail.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 6 hours ago









                  SvenSven

                  87.4k10147199




                  87.4k10147199























                      2















                      I'm concerned if there are circumstances under which my MTA would use
                      some relay when sending mail.




                      No. Your server will attempt to send email to the MX record(s) for the destination domain.






                      share|improve this answer



























                        2















                        I'm concerned if there are circumstances under which my MTA would use
                        some relay when sending mail.




                        No. Your server will attempt to send email to the MX record(s) for the destination domain.






                        share|improve this answer

























                          2












                          2








                          2








                          I'm concerned if there are circumstances under which my MTA would use
                          some relay when sending mail.




                          No. Your server will attempt to send email to the MX record(s) for the destination domain.






                          share|improve this answer














                          I'm concerned if there are circumstances under which my MTA would use
                          some relay when sending mail.




                          No. Your server will attempt to send email to the MX record(s) for the destination domain.







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered 3 hours ago









                          joeqwertyjoeqwerty

                          96.5k465149




                          96.5k465149



























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