Hello everyone.
I installed mainwp, configured everything, linked my sites.
It works really well but I have a problem: I do NOT receive ANY notification emails … no notice on the availability of updates, nothing!
I installed WP Mail SMTP with sendinblue and theoretically everything works but I never get the mainwp’s 
HI Gianluca,
Can you please post the community system report from your MainWP Dashboard for review? The report is located in your Dashboard under Status → Server, on the top right of the page.
Be sure to use the button like the one below; this button hides all your private information:
Pressing the button auto-copies the report to your clipboard then just paste it in a reply here.
Look:
### Server Info Required Detected Status ###
MainWP Dashboard
MainWP Dashboard Version 4.1.6 4.1.6 Pass
MainWP Upload Directory Writable Writable Pass
MainWP Extensions
Advanced Uptime Monitor Extension 5.1.1 API License Active Pass
MainWP BackWPup Extension 4.0.3 API License Active Pass
MainWP Sucuri Extension 4.0.8.1 API License Active Pass
MainWP Vulnerability Checker Extension4.0.3.1 API License Active Pass
WordPress
WordPress Version >=3.6 5.7.2 Pass
WordPress Memory Limit >=64M 40M Warning
MultiSite Disabled =true true Pass
FileSystem Method = direct direct Pass
PHP
PHP Version >=5.6 7.4.13 Pass
PHP Safe Mode Disabled =true true Pass
PHP Max Execution Time >=30 seconds 30 Pass
PHP Max Input Time >=30 seconds 60 Pass
PHP Memory Limit >=128M 512M Pass
PCRE Backtracking Limit >=10000 1000000 Pass
PHP Upload Max Filesize >=2M 24M Pass
PHP Post Max Size >=2M 32M Pass
SSL Extension Enabled =true true Pass
SSL Warnings = empty Pass
cURL Extension Enabled =true true Pass
cURL Timeout >=300 seconds 60 Warning
cURL Version >=7.18.1 7.29.0 Pass
cURL SSL Version >=OpenSSL/0.9.8l NSS/3.53.1 Pass
PHP Allow URL fopen YES
PHP Exif Support YES ( V7.4.)
PHP IPTC Support YES
PHP XML Support YES
PHP Disabled Functions No functions disabled.
PHP Loaded Extensions Core, PDO, Phar, Reflection, SPL, SimpleXML, apache2handler, bcmath, bz2, calendar, ctype, curl, date, dom, exif, fileinfo, filter, ftp, gd, gettext, gmp, hash, iconv, intl, json, libxml, mbstring, mcrypt, mysqli, mysqlnd, openssl, pcre, pdo_mysql, pdo_sqlite, posix, session, shmop, sockets, sodium, sqlite3, standard, sysvmsg, sysvsem, sysvshm, tidy, tokenizer, xml, xmlreader, xmlwriter, xsl, zip, zlib
MySQL
MySQL Version >=5.0 10.2.36-MariaDB Pass
MySQL Mode ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
MySQL Client Encoding utf8mb4
Server Info
Server Software Apache/2.4.6 (CentOS) OpenSSL/1.0.1e-fips mod_fcgid/2.3.9 PHP/7.4.13
Operating System Linux
Architecture 64 bit
Server Protocol HTTP/1.1
HTTPS ON
Server self connect Response Test O.K.
User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36 OPR/76.0.4017.123
Gateway Interface CGI/1.1
Memory Usage 42.84 MB
Request Time 1621884574
Accept Content text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Charset Content N/A
MainWP Settings
Number Of Child Sites 38
Use WP-Cron Yes
Optimize for Shared Hosting or Big NetworksYes
Automatic Daily Update Install trusted updates
Abandoned Plugins/Themes Tolerance 365
Maximum number of posts to return 50
Maximum number of pages to return
Primary Backup System MainWP BackWPup Extension
Maximum simultaneous requests 4
Minimum delay between requests 200
Maximum simultaneous requests per ip1
Minimum delay between requests to the same ip1000
Maximum simultaneous sync requests
Minimum simultaneous install/update requests
Active Plugins
All In One WP Security 4.4.8 Active
Disable Comments 2.1.1 Active
MainWP Dashboard 4.1.6 Active
WP Mail SMTP 2.8.0 Active
Hi Gianluca,
Thanks. Report looks fine.
Just to be 100% sure, can you tell me if emails have been working normally before you installed the WP Mail SMTP plugin?
it is a new installation, on my server I have no email service and I use this plugin (the test works) for sending
Hi Gianluca,
Thanks for verifying that.
Can you please review the MainWP > Setting > Email Settings one more time and verify that the correct email address is set for the included emails and make sure that are all enabled?
yes it is correct
I specify that MainWP is installed in a VPS
Hi Gianluca,
Would you mind opening a private Help Desk ticket so we can collect some additional information & investigate further?
ok, i open ticket
let me know what data I have to send
Upon further investigation, I found that the WP Cron is not working properly on your website.
I installed the WP Crontrol plugin to your website to see what is going on, and the plugin showed me this error:
There was a problem spawning a call to the WP-Cron system on your site. This means WP-Cron events on your site may not work. The problem was: Unexpected HTTP response code: 503
As per the plugin documentation, the error 503 means that the problem is caused on the server side.
It may be best to contact the hosting provider to review server logs and see what is preventing the WP Cron to function normally.
From the checks carried out, it is the All in one Wp Security and Firewall plugin that gives problems
happens to others?
I haven’t seen it before, but it might be best to check with the plugin author about this.
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