If your mail is not delivered to gmail or other providers, you need to check if your mail provider has an SPF OR DKIM record set up in you mail account.
If not, e-mails are getting rejected by gmail.
https://support.google.com/mail/answer/81126?hl=en&sjid=6130548297486259015-EU#authentication
yes I know, some providers in Germany are using custom DNS, I just had the problem
This is done by most of providers automatically example cpanel. If you are using custom dns provider then you surely need to setup every record.
Due to the many requests in the past for additonal features and components we have decided to develope a premium version. Features like Hashtags, Videos, Polls, Events, Stories, Link Preview, etc included in it.
$199 (Life Time)