#How to use gammadyne mailer without smtp code#
The HTML code should be validated for correctness.Don't use a subject that is Title Case or ALL CAPS.Unfortunately, the spam filter probably does not report which phrases it is flagging. If it contains phrases like "buy viagra" or "penis enlargement", this is a dead give-away. The content of the email could cause it to be flagged as spam.Many email clients do not display images by default, and many spam filters don't like this. Don't put your content in one large image.Recipients will be more likely to unsubscribe instead of filing a spam complaint. List plenty of contact information, including your physical address.Identical mass emails are more likely to be flagged. Don't use a free email address, like Hotmail or Gmail, in the From: header or in an email hyperlink.In fact, SPF and DKIM won't work otherwise.
Ideally, the From: header should use the same domain as the relaying SMTP server. Explain to the recipient why they are receiving the email.