Many of my friends use Gmail. When I want to send them attractive emails, I have a group named everyone that I use it.
After that I send email to my friends, and remind them to check their mailboxes, they tell me, not delivered! But when I tell them
please check your Spam folder
They report that they've received it. Is there any way to tell Gmail to send, x mails every y minutes?
Best Answer
Short answer: You cannot send more than 500 emails in a day from a single Gmail account.
Google will temporarily disable your account if you send messages to more than 500 recipients or if you send a large number of undeliverable messages.
If you access Gmail via POP or IMAP clients (like Microsoft Outlook), you can send an email message to a maximum of 100 people at a time. Cross the limit and your account will be disabled for a day with the error “550 5.4.5 Daily sending quota exceeded.
Gmail has these guidelines for sending bulk emails. You may ask your friends to add you email address to their Contacts list to avoid emails you send from landing in their Spam folder