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Howto test secure connection to email server
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| #SSL | |
| openssl s_client -connect <MAIL_HOST>:465 -crlf -ign_eof | |
| #StartTLS | |
| openssl s_client -connect <MAIL_HOST>:25 -starttls smtp | |
| #Without security | |
| telnet <MAIL_HOST> 25 | |
| # sending SMTP email | |
| mailx -v -s "test" \ | |
| -S smtp=smtp://<MAIL_HOST> \ | |
| -S from="no-reply@example.com" \ | |
| michael@sender-address.de |
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