Neodesílám na gmail

D den, prosím o radu:

D den, cca 14 dní nemohu odeslat z mého EMC mail na adresu . gmail.com.Vrací se mi toto:
Greetings from the MDaemon mail system at smtp.brouzdej.net =
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Attempting SMTP connection to alt4.gmail-smtp-in.l.google.com
Resolving AAAA record for alt4.gmail-smtp-in.l.google.com (DNS Server: 79.98.72.27)...
* D=alt4.gmail-smtp-in.l.google.com TTL=(5) AAAA=[2607:f8b0:400e:c00::1a]
Attempting SMTP connection to [2607:f8b0:400e:c00::1a]:25
Waiting for socket connection...
* Connection established [2a02:970:1::ea5]:53893 --> [2607:f8b0:400e:c00::1a]:25
Waiting for protocol to start...
<-- 220 mx.google.com ESMTP l6-20020a170902f68600b001a9a87d0c09si1761635plg.496 - gsmtp
--> EHLO smtp.brouzdej.net
<-- 250-mx.google.com at your service, [2a02:970:1::ea5]
<-- 250-SIZE 157286400
<-- 250-8BITMIME
<-- 250-STARTTLS
<-- 250-ENHANCEDSTATUSCODES
<-- 250-PIPELINING
<-- 250-CHUNKING
<-- 250 SMTPUTF8
--> STARTTLS
<-- 220 2.0.0 Ready to start TLS
SSL negotiation successful (TLS 1.2, 255 bit key exchange, 128 bit AES encryption)
SSL certificate is valid (matches alt4.gmail-smtp-in.l.google.com and is signed by recognized CA)
MTA-STS success for gmail.com
--> EHLO smtp.brouzdej.net
<-- 250-mx.google.com at your service, [2a02:970:1::ea5]
<-- 250-SIZE 157286400
<-- 250-8BITMIME
<-- 250-ENHANCEDSTATUSCODES
<-- 250-PIPELINING
<-- 250-CHUNKING
<-- 250 SMTPUTF8
--> MAIL From:<jipi.elektro@seznam.cz> SIZE=2525
<-- 250 2.1.0 OK l6-20020a170902f68600b001a9a87d0c09si1761635plg.496 - gsmtp
--> RCPT To:<khonsun@gmail.com>
<-- 250 2.1.5 OK l6-20020a170902f68600b001a9a87d0c09si1761635plg.496 - gsmtp
--> DATA
<-- 354 Go ahead l6-20020a170902f68600b001a9a87d0c09si1761635plg.496 - gsmtp
Sending <xxxxxxxxxxxxxxxxxxxxxxxx\pd50003376646.msg> to [2607:f8b0:400e:c00::1a]
Transfer Complete
<-- 550-5.7.26 This mail is unauthenticated, which poses a security risk to the
<-- 550-5.7.26 sender and Gmail users, and has been blocked. The sender must
<-- 550-5.7.26 authenticate with at least one of SPF or DKIM. For this message,
<-- 550-5.7.26 DKIM checks did not pass and SPF check for [seznam.cz] did not pass
<-- 550-5.7.26 with ip: [2a02:970:1::ea5]. The sender should visit
<-- 550-5.7.26 support.google.com/... ... entication for
<-- 550 5.7.26 instructions on setting up authentication. l6-20020a170902f68600b001a9a87d0c09si1761635plg.496 - gsmtp
--> QUIT
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= End Transcript =
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Prosím půjde s tím něco udělat? Děkuji . W10