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How to turn on encryption and authentication for the SMTP server

Questions regarding the Mail Server
Dovecot, Exim, RoundCube
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celsomtrindade
Posts: 1
Joined: Sat Jul 04, 2020 2:02 am

Os: Ubuntu 17x
Web: nginx + php-fpm
How to turn on encryption and authentication for the SMTP server
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Post by celsomtrindade » Sat Jul 04, 2020 2:12 am

First of all, I'm completely new to Vesta CP or VPS in general, but I'm trying to setup an online store using WordPress Woocommerce on a VPS and also use e-mails. Everything is working fine, except the e-mails.

I can receive it, but I can't send it. After something exploring stuff I found the error message bellow in this file: "/var/log/exim4/mainlog".

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020-07-03 22:49:09 1jrXIh-0006jn-Ut H=mx1.weblink.com.br [~some-ip-i-guess~]: SMTP error from remote mail server after RCPT TO:<{~my-destination-email~}>: 450 4.2.0 <unknown[~my.ip.address~]>: Client host rejected: Greylisted, see http://postgrey.schweikert.ch/help/domain.com.html
When I access the information link it says I have to turn on encryption and authentication for the SMTP server. However I have no idea how to do it, since I'm new to this area.

Here's how I did it so far. Installed Vesta CP using this command:

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bash vst-install.sh --nginx yes --phpfpm yes --apache no --named yes --remi yes --vsftpd yes --proftpd no --iptables yes --fail2ban yes --quota no --exim yes --dovecot yes --spamassassin yes --clamav yes --softaculous no --mysql yes --postgresql no
After that I enabled the SSL Let's encrypt for the domain and also checked the use of SSL of the web on mail and Vesta CP.
What else do I need to do to make it work?
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dpeca
VestaCP Team
Posts: 473
Joined: Wed Nov 25, 2015 7:30 pm

Re: How to turn on encryption and authentication for the SMTP server
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Post by dpeca » Sat Jul 04, 2020 2:42 pm

viewtopic.php?f=10&t=17353&p=72237
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