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Sentora, problem sending an email arrives in the spam box

Posted June 9, 2017 2.5k views
CentOSEmailDNS

Hi.
I have a droplet with sentora, the problem I have is that when sending an email this arrives in the spam box (I did the tests of sending mails to gmail and Outlook).
I have configured the DNS of the Digital Ocean as follows

A - mail - IP - 3600TTL
MX - mail.dominio.com - 10 - 3600TTL
TXT - dominio.com - v=spf1 mx ~all - 3600TTL

I also use the NS of digital ocean
ns1.digitalocean.com
ns2.digitalocean.com
ns3.digitalocean.com

I made the same setting in the DNS Manager for the sentora.

I hope you can help me.
Thank you

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jackch
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jackch

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1 answer
hansen June 9, 2017

Hi @jackch

There’s no reason to have the settings in Sentora also, since you’re using DigitalOcean’s name servers, so it should be enough to have the configuration there.

Have you set your PTR (reverse DNS)? It should be mail.dominio.com
https://cloud.digitalocean.com/networking/ptr

It takes time to setup a good configuration, so you don’t end up in spam folders - it would be recommended that you setup DKIM too (not sure if that’s a feature in Sentora).

Try sending a mail to https://www.mail-tester.com/ to figure out what you should focus on. Just ignore statements about HTML and stuff like that, since the tester is made for newsletters.

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  • jackch June 16, 2017

    Thanks for your help, it helped me a lot to get my mail server up.
    Indeed the problem was rDNS (PTR), another problem was about DKIM signatures. Finally investigating a little more manage to implement TLS with let'sencript now my mail server is ok.
    Doing the tests with https://www.mail-tester.com/ you get 10/10.
    thanks for your support.

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