Emails to gmail domain bounce

[anotherrohit]

I am using roundcube mail services for my personal website, but when i send emails to gmail accounts, they fail with. anyone able to resolve this issue?
te-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; This mail is unauthenticated, which poses a
    security risk to the 550-5.7,2211 sender and Gmail users, and has been
    blocked. The sender must 550-5.7.2211 authenticate with at least one of SPF
    or DKIM. For this message, 550-5.7.2211 DKIM checks did not pass and SPF
    check for [mydomain.com] did not 550-5.7.22211 pass with ip: [1111.1.1.01].
    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.
    x24-20020aa7d6d8000000b00514b8791a4esi1169770edr.590 - gsmtp

[JohnDoh]

there is no Roundcube mail service. Roundcube is a web based IMAP client. the error comes from a problem with your SMTP server setup.

[Dmitry42]

your mail server can't pass spam filter check.

You must config your DNS record for SPF, DKIM, DMARC and etc