Found it. Was required to modify smtp_auth to customer1.de user1:password customer2.de user2:password.
Am Do., 22. Nov. 2018 um 10:22 Uhr schrieb Stefan Bauer < cubew...@googlemail.com>: > After setting > > smtp_sender_dependent_authentication = yes > > and adding additional credentials postfix rejects change with > > #root@postgate01:~# nano /etc/postfix/smtp_auth > > [securegw.intern]:25 user1:password > [securegw.intern]:25 user2:password > > root@postgate01:~# more /etc/postfix/relayhost_maps > @customer1.de [securegw.intern]:25 > @customer2.de [securegw.intern]:25 > > #root@postgate01:~# postmap /etc/postfix/smtp_auth > *#postmap: warning: /etc/postfix/smtp_auth.db: duplicate entry: > "[securegw.intern]:25"* > #root@postgate01:~# /etc/init.d/postfix reload && /etc/init.d/postfix > restart > #[ ok ] Reloading postfix configuration (via systemctl): postfix.service. > #[ ok ] Restarting postfix (via systemctl): postfix.service. > > I would like to route different customers to same relayhost but with > different credentials. > > Am Mo., 5. Nov. 2018 um 20:47 Uhr schrieb Wietse Venema < > wie...@porcupine.org>: > >> Stefan Bauer: >> > Hi, >> > >> > i have: >> > sender_dependent_relayhost_maps = hash:/etc/postfix/relayhost_maps >> > smtp_sasl_password_maps = hash:/etc/postfix/smtp_auth >> > >> > more /etc/postfix/relayhost_maps >> > @mydomain.de [smtp.1und1.de]:587 >> > @my2domain.de [smtp.1und1.de]:587 >> > >> > more /etc/postfix/smtp_auth >> > [smtp.1und1.de]:587 mydomain:mydomainpass >> > >> > How can i specify different credentials for same relayhost? >> >> smtp_sender_dependent_authentication = yes >> >> This will first index smtp_sasl_password_maps with the sender >> address, then the host, then the next-hop domain (whatever that >> happens to be). >> >> Wietse >> >> > mails from my2domain.de should be relayed through 1und1 but with its >> own >> > credentials. >> > >> > Thank you. >> > >> > Stefan >> >