SMTP Server Settings

Sending Emails with various servers can be a challenge. In this blog article we like to collect the settings needed for using our SendMail functions in FileMaker or CURLEmailMBS class in Xojo to send emails. As you see we always prefer to use encryption.

Bei checking certificates, we can detect and avoid giving our password to a transparent proxy. And we enable TLSv1.2 for all here and require encrypted connection. It's important to test and verify this, as I once run into a hotel reading my emails to count them and prevent spamming.

Setting	Value	Comment
Domainfactory Our provider domainfactory offers email servers which we use for sending our own emails.
SMTPServer	"sslout.df.eu"	The ssl smtp server.
SMTPUsername		Your email
SMTPPassword		Your password
OptionPort	587	The port for SMTP over TLS
OptionUseSSL	3	Require encrypted connection
OptionSSLVerifyHost	2	Verify host
OptionSSLVerifyPeer	1	Verify peer
OptionSSLVersion	6	TLS v1.2
OptionCAInfo	sslout.df.eu.cer	The file with certificate used by server.
gmail
Setting	Value	Comment
SMTPServer	"smtp.gmail.com"	The google smtp server.
SMTPUsername		Your gmail email
SMTPPassword		Your gmail password
OptionPort	587	The port for SMTP over TLS
OptionUseSSL	3	Require encrypted connection
OptionSSLVerifyHost	2	Verify host
OptionSSLVerifyPeer	1	Verify peer
OptionSSLVersion	6	TLS v1.2
OptionCAInfo	cacert-google.pem	The file with certificate used by server. Just a pem file with GlobalSign Root CA - R2 seems to be enough.
For Gmail you need to allow less secure apps on website in your account settings. I would recommend a separate gmail account for sending emails.
t-online.de
Setting	Value	Comment
SMTPServer	"securesmtp.t-online.de"
SMTPUsername		Your t-online email
SMTPPassword		Your t-online password
OptionPort	587	The port for SMTP over TLS
OptionUseSSL	3	Require encrypted connection
OptionSSLVerifyHost	2	Verify host
OptionSSLVerifyPeer	1	Verify peer
OptionSSLVersion	6	TLS v1.2
OptionCAInfo	cacert-telekom.pem	The file with certificate used by server. Just a pem file with Deutsche Telekom Root CA 2 seems to be enough.
Office 365
Setting	Value	Comment
SMTPServer	"smtp.office365.com"
SMTPUsername		Your office 365 login
SMTPPassword		Your office 365 password
OptionPort	587	The port for SMTP over TLS
OptionUseSSL	3	Require encrypted connection
OptionSSLVerifyHost	2	Verify host
OptionSSLVerifyPeer	1	Verify peer
OptionSSLVersion	6	TLS v1.2
OptionCAInfo	cacert-office.pem	The file with certificate used by server. Just a pem file with Deutsche Telekom Root CA 2 seems to be enough.

Update: Yahoo also works with using smtp.mail.yahoo.com, TLS and port 587. You need to enable less secure devices in security settings and pass in your login and password for the account.