It is necessary to purchase automatically generated mails in countries ( Seznam.cz,gmx.at,wp.pl.... where can I buy?

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where can I buy automatically generated mails in countries around the world ?
for example : Seznam.cz,gmx.at.gmx.ch,CHARTER.NET,JUNO.COM,OVERMAIL.DENAVER.COM ,PROTON.MEFASTMAIL.COMT-ONLINE.DE............
tg: @minmin_75
thank