Am 29.09.2011 21:45, schrieb Ralf Hildebrandt: > We're sending mail to addresses of the form: > xxx...@mobileemail.vodafone.de > > The MX for mobileemail.vodafone.de is: > > # host -t mx mobileemail.vodafone.de > mobileemail.vodafone.de mail is handled by 5 vodade.mx1.eu.blackberry.com. > mobileemail.vodafone.de mail is handled by 10 mx03.bis7.eu.blackberry.com. > mobileemail.vodafone.de mail is handled by 10 mx04.bis7.eu.blackberry.com. > mobileemail.vodafone.de mail is handled by 10 vodade.mx2.eu.blackberry.com. > mobileemail.vodafone.de mail is handled by 10 mx01.bis7.eu.blackberry.com. > mobileemail.vodafone.de mail is handled by 10 mx02.bis7.eu.blackberry.com. > > None of these hosts supports any kind of transport level security > (e.g. encryption using STARTTLS)
you should complain to blackberry maybe their server support TLS but do not anncounce it, even if THEY are responsible to offer STARTTLS and it is never the job of the sending server guess capabilities of the rcpt
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