Google Gmail
- Gmail email send limit – no more than 500 recipients per message for the Gmail web interface, or max 100 recipients if you are using an email client software.
- Gmail other SMTP limits – outgoing messages sent via Google Gmail can not exceed 10Mb per email (including attachments)
- Hotmail email send limit – no more than 100 recipients per day.
- Hotmail other SMTP limits – outgoing messages sent via Hotmail can not exceed 10Mb per email (including attachments).
- Yahoo Mail email send limit – no more than 100 emails or recipients per hour (2400 per day).
- Yahoo Mail other SMTP limits – max 10Mb per message for the free Yahoo Mail Service, or 20Mb per message for Yahoo! Mail Plus.
- Lycos Mail email send limit – max 25 recipients per message and max 250 emails per day.
- Lycos Mail other SMTP limits – Lycos Mail does not have a limit to the attachment file size at this time.
- AOL email send limit – no more than 100 recipients per message or 500 recipients per connection.
- AOL other SMTP limits – max 16mb per message.
