hoffmannmonika71@gmail.com
   host gmail-smtp-in.l.google.com [74.125.71.26]
   SMTP error from remote mail server after end of data:
   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 [mixershop.hu] did not
   550-5.7.26 pass with ip: [178.238.222.56]. The sender should visit
   550-5.7.26  https://support.google.com/mail/answer/81126#authentication for
   550 5.7.26 instructions on setting up authentication. d15-20020a5d538f000000b0031454f8d57bsi534638wrv.744 - gsmtp

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 [mixershop.hu] did not
550-5.7.26 pass with ip: [178.238.222.56]. The sender should visit
550-5.7.26  https://support.google.com/mail/answer/81126#authentication for
550 5.7.26 instructions on setting up authentication. d15-20020a5d538f000000b0031454f8d57bsi534638wrv.744 - gsmtp

Sziasztok, Saját domaint használunk, és a kimenő levelek nem mennek el a gmail fiókokba, más szolgáltatók email címére elmennem. Ezzel a hibaüzenettel pattannak vissza: This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: hoffmannmonika71@gmail.com host gmail-smtp-in.l.google.com [74.125.71.26] SMTP error from remote mail server after end of data: 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 [mixershop.hu] did not 550-5.7.26 pass with ip: [178.238.222.56]. The sender should visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for 550 5.7.26 instructions on setting up authentication. d15-20020a5d538f000000b0031454f8d57bsi534638wrv.744 - gsmtp Reporting-MTA: dns; tbfiftysix.tarhely.eu Action: failed Final-Recipient: rfc822;hoffmannmonika71@gmail.com Status: 5.0.0 Remote-MTA: dns; gmail-smtp-in.l.google.com Diagnostic-Code: smtp; 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 [mixershop.hu] did not 550-5.7.26 pass with ip: [178.238.222.56]. The sender should visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for 550 5.7.26 instructions on setting up authentication. d15-20020a5d538f000000b0031454f8d57bsi534638wrv.744 - gsmtp Köszönöm a segítséget ! Üdvözlettel König László