Luisfer1
Tengo instalado Thunderbird con mi cuenta de correo de IONOS. Cuando envío correos a cuentas gmail me salen rechazadas con el siguiente mensaje: Mail delivery failed: returning message to sender 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 failed:
lfps1950@gmail.com:
SMTP error from remote server for TEXT command, host: gmail-smtp-in.l.google.com (142.250.145.26) reason: 550-5.7.26 This mail is unauthenticated, which poses a security risk to th
e 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 [pueblosmadrid.net] did 550-5.7.26 not pass with ip: [212.227.126.130]. The sender should visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication fo r 550 5.7.26 instructions on setting up authentication. y25-20020a1709069159 00b009745ee66afcsi1762351ejw.411 - gsmtp.
Como lo puedo solucinar?