php - Sending mail from webserver to external mail server with local domain name -


this issue i've encountered several time , haven't yet found decent solution for:

sending e-mail webserver on e.g. "domain.com", info@domain.com hosted on external mail server e.g. google mail

in case send php on apache , on shared hosting, can imagine same case on other frameworks.

these e-mails seem delivered local mail server, if set mx records on server point right external mail server.

a solution use external smtp server, isn't easy when you're working clients either need set-up new e-mail account on server , provide smtp details or sign-up third-party smtp server.

what solution this? there no way around smtp?

most emai/mta server "autoconfigure" themselves. guess list of local email domains (doimans locally hosted mailboxes).

in sendmail case can turn off adding following line in sendmail.mc: 

define(`confdont_probe_interfaces', `true')

documentation : cf/readme - confdont_probe_interfaces


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