On 11/07/2014 11:35 AM, Sven Köhler wrote: > I don't have the option to buy one IP per hostname that I want to > support. As we all know, IPv4 addresses are expensive as they are not > many of them left.
The current best practice method in dealing with this is is you just have one hostname for submission (smtp.provider.tld) instead of one per domain, then everyone is instructed to use the one domain for submission (and likely for fetching email via IMAP as well, but that's off-topic for postfix). Peter
