How to send emails through an External SMTP Service?
I would like to send emails through an External SMTP Service (Yandex) with Sendmail on Ubuntu 18.04.3.
I set everything up: External SMTP Service, Sendmail, hostname. I added the MX record to my DNS.
~hostname childrengo.org (my domain) ~host childrengo.org childrengo.org has address <IP> childrengo.org mail is handled by 10 mx.yandex.net.
I made a file with my login and password - /etc/mail/authinfo/yandex-auth :
AuthInfo:smtp.yandex.ru "U:<My login>" "I:<email>" "P:<password>" "M:<login>" AuthInfo:smtp.yandex.ru:587 "U:<My login>" "I:<email>" "P:<password>" "M:<login>"
makemap hash /etc/mail/authinfo/yandex-auth < /etc/mail/authinfo/yandex-auth
I set up Sendmail to send emails through an External SMTP Service (Yandex).
But I have got an error in my syslog:
Jun 11 19:00:45 kids-app-api-droplet sm-mta: STARTTLS=client, relay=smtp.yandex.ru., version=TLSv1.3, verify=FAIL, cipher=TLS_AES_256_GCM_SHA384, bits=256/256 Jun 11 19:00:45 kids-app-api-droplet sm-mta: 05BInLgB007204: AUTH=client, available mechanisms do not fulfill requirements Jun 11 19:00:45 kids-app-api-droplet sm-mta: AUTH=client, relay=smtp.yandex.ru., temporary failure, connection abort Jun 11 19:00:45 kids-app-api-droplet sm-mta: 05BInLgB007204: to=<email@example.com>, ctladdr=<firstname.lastname@example.org> (0/0), delay=00:11:24, xdelay=00:00:00, mailer=relay, pri=300379, relay=smtp.yandex.ru. [<IP>], dsn=4.0.0, stat=Deferred: Temporary AUTH failure
I checked this https://www.digitalocean.com/community/tutorials/how-to-send-email-through-an-external-smtp-service-with-sendmail-on-freebsd-10-1 and this https://www.digitalocean.com/community/questions/ubuntu-14-04-lamp-installed-sendmail-fatal-error-when-i-sent-first-message It did not help.
- I installed cyrus-sasl*
- I have the TXT records for DMARC1, spf1 and DKIM for my domain.
- I have tried different users to send email. And I checked the password. I also checked the user exists.
I also don’t see these errors in my mail.log and in mail.err
Do you have any idea how to fix it? Or may be how to debug it?
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.×