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Yesterday I received two emails from Kundenbetreuung@o2.com and info@telefonica.com?. It was very strange.



First, the email address seems wrong, because I can never send the email to Kundenbetreuung@o2.com or  info@telefonica.com.



Second, the coming email asked me to make a signature and fax the signature to the fax number 0800 55 222 55. I strongly doubt that it is a cheat.



Does anybody have similar experience?



Thank you.



What is it what the sig is for? Did you order anything, or requested any changes?



I requested change. But I doubt whether the email address and the fax number is correct or not. because I can never send the email to this email address.



The following is the reply



The original message was received at Wed, 5 Oct 2016 17:07:48 +0100 from vip-mimesweeper.uk.pri.o2.com [172.17.199.43]



----- The following addresses had permanent fatal errors ----- kundenbetreuung@o2.com



(reason: 550 5.1.1 User unknown)



----- Transcript of session follows ----- ... while talking to [10.173.249.66]:



>>> DATA



<<< 550 5.1.1 User unknown



550 5.1.1 kundenbetreuung@o2.com... User unknown <<< 503 5.5.2 Need Rcpt command.



If you requested a change and you are asked for auf and Fax it, so it is legit. And you see what you sign, so if it corresponds to your request, do it.



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