Max number of Emails allowed to Sent from Gmail SMTP per day

Gmail’s SMTP is convenient. You “sender” needs not to be always your Gmail address (but the emails will include your Gmail address in the header “send by”). I am wondering how many emails at maximum can I send each day through Gmail’s SMTP.

Here there a nice recent list of the sending limits of the major email providers

There are many “buzz” on the Web. However, the only official information that I can found is . (If you are using Google Apps, the limitation is different)

Several important statements:

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. … you may only send a message to 100
at a time. … Your account should be re-enabled within 24 hours.

20 emails per hour seems safe. And make sure not sending too many undeliverable emails. The limitation is not based on days but “24 hours”.

If you are wondering other email providers/hosting services’ limitations, this list may b ehelpful:

Eric Ma

Eric is a systems guy. Eric is interested in building high-performance and scalable distributed systems and related technologies. The views or opinions expressed here are solely Eric's own and do not necessarily represent those of any third parties.

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