Emails and spam filters
We regularly check yve against spam filters, but can not guarantee that yve emails do not end up in the spam filter. The yve email templates are tested against the common email spam filters:
Sending throttel: yve sends emails individually at a speed of about 2 emails per second. E-mails to the same recipient domain are sent with an interval of 1 second per yve e-mail server. This ensures that no server gets too many emails at once.
SPF: Emails with the MAIL FROM yve-tool.de have a valid SPF record. If you use your own MAIL FROM address you have to set the SPF record for spf.yve-tool.de.
DKIM: Emails with the MAIL FROM yve-tool.de are DKIM signed. If you have your own MAIL FROM domain, you have to refer to our DKIM records with a CNAME record.
Sender ID: Emails with the MAIL FROM yve-tool.de are set so that the Sender ID Check is positive. If you have your own sender address, you have to create an SPF record for spf.yve-tool.de.
DMARC: Emails with the domain yve-tool.de are set so that the DMARC check is positive. If you have your own sender address, you must also set up the MAIL FROM (see above) with SPF and DKIM record.
Graylisting: some receiving e-mail servers reject the e-mail with a temporary error message on the first attempt at delivery, but then accept this after a further attempt. This means that spammers are rejected because they often do not attempt to deliver again. yve tries to deliver an e-mail starting 5 increasing to 180 minuts for 12 hours if a temporary error message appears. After that, it will be considered undeliverable and you will receive a bounce message.
If you have created your own sender address, you must make the entries for SPF, DKIM, etc. yourself in your domain (see above, email sender).
We cannot, of course, foresee the content of your email, there are many traps in which they can tap. Many spam relevant terms and of course all possible obscene terms are on the spam filter lists. Every email recipient has a long-standing personal relationship with his spam filter. This remembers content very precisely, if the recipient itself identifies an email as spam.
Therefore you should test your emails yourself, see the article 'Testing, testing, testing'.