How to get emails to your users without going to spam folder...
When you send an email to free email providers like hotmail, yahoo, etc. try to send no more than 2 emails within 2-3 minutes.
The reason is that these providers will check the emails source: They allow 1st email to the receiver. Then, if they see the 2nd email from the SAME source in less than 1 minute, they may take it as a SPAM and send it to the spam folder.
I know this because when I signed up for a membership site, they send me 4 emails in a space of 1 minute. The email content include:
1) Receipt
2) Login information
3) Membership information
4) Instructions of membership
Basically, I did not receive email (3) and (4) as they are found in my Yahoo spam folder. To Yahoo, this is SPAM and I think it is logical for Yahoo to do so.
My advice to you is:
If you are selling a product/services/membership, send no more than 2 initial emails.
Have only critical information like login, helpdesk infor, etc. in the emails only.
For the rest of the information, get them to the website.
It should restrict you to just 2 emails sent to the same user. If you can squeeze everything into one email, that is even better.
Consulting Tycoon