Issue SMTP not working to some providers

[sittnermarco]

Hello,

when i send a mail from my server (with a wordpress contact form, not an existing adress) to a gmail adress it works fine. When i send a mail to another provider then its just stuck in my mail queue.
I tried postfix smtp first and then qmail but it didnt help.
I also added my server domain as reverse dns for my ipv4 and ipv6 and added an spf record for my server to the domain from that i wanna send mails.

How is it possible that gmail receives the mails and other providers dont?

I am using Cent OS 7 with Plesk Obisidan (up to date) and PHP 7.3.
I tried to find the problem in mail log but theres no mail log. /usr/local/psa/var/log/maillog doesnt exist in my files. In /usr theres no local folder.

I would be glad if someone could help me.

Best regards
Marco

 

[IgorG]

I tried to find the problem in mail log but theres no mail log. /usr/local/psa/var/log/maillog doesnt exist in my files. In /usr theres no local folder.

What about logs from /var/log/maillog ?

 

[sittnermarco]

What about logs from /var/log/maillog ?

In /var theres only a "tmp" folder.

 

[IgorG]

A lot of Plesk system directories are located in /var:

# grep var /etc/psa/psa.conf
...
HTTPD_VHOSTS_D /var/www/vhosts
HTTPD_LOG_D /var/log/httpd
QMAIL_ROOT_D /var/qmail
PLESK_MAILNAMES_D /var/qmail/mailnames
NAMED_RUN_ROOT_D /var/named/chroot
MYSQL_VAR_D /var/lib/mysql
MYSQL_SOCKET /var/lib/mysql/mysql.sock
PGSQL_DATA_D /var/lib/pgsql/data
PGSQL_CONF_D /var/lib/pgsql/data
DUMP_D /var/lib/psa/dumps
MAILMAN_VAR_D /var/lib/mailman
AWSTATS_BIN_D /var/www/cgi-bin/awstats
AWSTATS_DOC_D /var/www/html/awstats

Do you have a highly customized Plesk installation?

 

[sittnermarco]

My VPS is hosted by Strato so Plesk was just a one-click installation for me. Maybe the install is a customized version but i dont know.
Im having a "logs" folder in my base-folder but it doesnt contain any maillog.
I also dont find the system directories, you described anywhere.

 

[IgorG]

I'd suggest you contact Plesk Support Team. They will check and fix the issue directly on your server.

 

[Martin Dias]

Also, check the command:

# mailq

This should show the stuck mails and also the error/status