Limitations
There are several rate limitations and restrictions that you should be aware of when using the v3 Mail Send endpoint.
- The total size of your email, including attachments, must be less than 30MB.
- The total number of recipients must no more than 1000. This includes all recipients defined within the
to,cc, andbccparameters, across each object that you include in thepersonalizationsarray. - The total length of custom arguments must be less than 10000 bytes.
- Unicode encoding is not supported for the
fromfield. - The
to.name,cc.name, andbcc.namepersonalizations cannot include either the;or,characters.
For more specific, parameter level requirements and limitations, please refer to the v3/mail/send documentation.
Need some help?
We all do sometimes. Get help now from the Twilio SendGrid Support Team.
Running into a coding hurdle? Lean on the wisdom of the crowd by browsing the SendGrid tag on Stack Overflow or visiting Twilio's Stack Overflow Collective.
