I've tried multiple e-mail accounts and can't get my computer to talk to the e-mail server. I've loaded and re-loaded the SMTP and IMAP settings. Everything seems in order, but it just doesn't want to work. "Could not connect to this SMTP server" is the message. I tried it with Yahoo free mail and Gmail.
Nothing works.
I'm running OSX 10.9.5 and Mail version 7.3.
MacOS – Can’t send or receive e-mail via Mail
imapmacosmail.appsmtp
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Best Answer
When you are located in Germany and your ISP is "Deutsche Telekom" AND you have a DSL router provided by "Deutsche Telekom", then check your router configuration at the Internet options "Sichere Emailserver" (secure email servers). Maybe this option is also called "Vertrauenswürdige Emailserver" (trusted email servers), it depends on the router firmware.
If the Google servers are NOT in that trusted list, the router blocks every connection attempt to these servers. You can disable that list in the router configuration UI or you can add the Google servers. This also occurred in the router settings from a friend of mine.
That totally freaked me out when I tried to setup Apple Mail for my private Email server...