Titan's email policy includes hourly and daily email send limits.
| alert-warning | If your domain is on any trial plan on Titan, then the same email limits of the Free plan will be applicable |
Outgoing email limit
Email transfer with different domains
| Parameter | Plan Type | Rate limit |
| Domain | Paid | NA |
| Domain | Free | 1000 emails/hour, 2000 emails/day |
| Mailbox | Paid/Free |
200 emails/hour, 500 emails/day |
Email transfer within the same domain
| Parameter | Plan Type | Rate limit |
| Domain | Paid | NA |
| Domain | Free | NA |
| Mailbox | Paid/Free |
1000 emails/hour, |
If an outgoing email surpasses the above-listed limit, the emails will fail and may bounce back with an undeliverable message with the following error codes:
Hourly quota
- 550 5.4.6 Sender Domain Hourly Quota Exceeded - [domain=$domain] will not be allowed to send emails till [time=$time]: Domain's hourly quota of sending emails has been exceeded, outgoing email services would resume after the mentioned time(in GMT) in the bounce-back message
- 550 5.4.6 Sender Hourly Quota Exceeded - [account=$account] will not be allowed to send emails till [time=$time]: Email account's hourly quota of sending emails has been exceeded, outgoing email services would resume after the mentioned time(in GMT) in the bounce-back message
Daily quota
- 550 5.4.6 Sender Domain Daily Quota Exceeded - [domain=$domain] will not be allowed to send emails till [time=$time]: Domain's daily quota of sending emails has been exceeded, outgoing email services would resume after the mentioned time(in GMT) in the bounce-back message
- 550 5.4.6 Sender Daily Quota Exceeded - [account=$account] will not be allowed to send emails till [time=$time] as daily email sending limit has been exceeded: Email account's hourly quota of sending emails has been exceeded, outgoing email services would resume after the mentioned time(in GMT) in the bounce-back message
| alert-warning | If an outgoing email surpasses the above-listed limit, the emails will fail and may bounce back with an undeliverable message with the following error codes: 550 5.4.6 Sender Quota Exceeded |
Incoming email limit:
Email transfer with different domains
| Parameter | Plan Type | Rate limit |
| Domain | Paid | NA |
| Domain | Free | 1000 emails/hour, 2000 emails/day |
| Mailbox | Paid/Free |
500 emails/hour |
Email transfer within the same domain
| Parameter | Plan Type | Rate limit |
| Domain | Paid | NA |
| Domain | Free | NA |
| Mailbox | Paid/Free |
1000 emails/hour |
| alert-warning | Violating the above limits will render your account temporarily unreachable to senders. |
Incoming email limit for a non-existing mailbox:
There is a soft-limit for the maximum number of emails sent to a non-existing mailbox, a domain can accept.
Rate limit: 500 emails/hour and 1000 emails/day
Once the rate is exceeded, the domain won't be able to accept any mail to a non-existing email address, however, the incoming email to the actual email won't get impacted until the domain/email rate limit defined earlier.
| alert-success | For a mass emailing solution, we recommend using Constant Contact and Sendgrid for your emails. |