Microsoft has introduced stricter verification requirements for Outlook accounts.
If you use Google Workspace for business email, your email address may not end with @gmail.com.
If you are using Outlook accounts for OAuth2 sending with AtomEmailPro, please read the following note before setting up your accounts.
When people talk about bulk email sending, the conversation often moves quickly toward APIs.
When people hear “automated Gmail sending,” they often think about Gmail API, SMTP servers, or third-party email delivery platforms.
When people think about email automation, they usually think about email marketing platforms, SMTP servers, APIs, campaign dashboards, and contact databases.
There is no single number that works for every email account, but the practical answer is: it depends on the email provider, account type, account reputation, and how you send the emails.
Sending bulk emails from a single Gmail account may work for small campaigns, but it quickly becomes difficult when your email volume grows.
