Postfix Configure Multiple ISP Client SMTP Authentication
last updated in Categories CentOS, Debian / Ubuntu, EMail Servers, Fedora Linux, FreeBSD, Linux, Networking, OpenBSD, RedHat and Friends, Suse, Troubleshooting, Ubuntu Linux, UNIXHow do I support multiple ISP accounts in the Postfix SMTP client (smarthost) for relaying email? For example:
[a] user1@isp1.com must be relay via smtp.isp1.com.
[b] user1@isp2.com must be relay via smtp.isp2.com.
[c] me@mycorp.com must relay all my default email via smtp.mycorp.com.