Nedoručuje se nám pošta z czemp.cz na gmail.com

Dobrý den,

z domény czemp.cz máme problém s doručováním pošty na gmail.com. Ze serveru se vrací informace, že zpráva nemohla být doručena – viz kopie níže.

Můžete nám prosím pomoci s vyřešením?

Děkuji, MS

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This is the mail system at host wes1-so2.wedos.net.

I’m sorry to have to inform you that your message could not be delivered to one or more recipients. It’s attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

The mail system

<***@gmail.com>: host gmail-smtp-in.l.google.com[142.250.102.27]

said: 550-5.7.26 This message does not have authentication information or

fails to 550-5.7.26 pass authentication checks. To best protect our users

from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26

https://support.google.com/mail/answer/81126#authentication for more 550

5.7.26 information. qf28-20020a1709077f1c00b006da92802dddsi10599130ejc.930

– gsmtp (in reply to end of DATA command)