As soon as you activated Email hosting for your domain, you need to do a few little settings in the domain’s DNS zone, so your email service works correctly.
Where to do changes?
If your domain is bought in Hostinger and points elsewhere by A record (while using Hostinger NS records), open Domains → domain name → DNS / Nameservers:

If your domain points to Hostinger by NS records (either bought in Hostinger or elsewhere), open Hosting → Manage → DNS Zone Editor:
If the domain is bought elsewhere and points to Hostinger only by an A record, the changes should be done on the same service, whose NS records are used.
Setting MX record for Titan Email
Before you add new values make sure to delete all old values of MX records - otherwise, it can affect your emails’ work.
You need to create the following MX records:
Priority | Host | Points to | TTL |
10 | @ | mx1.titan.email | 1 hour/3600 seconds |
20 | @ | mx2.titan.email | 1 hour/3600 seconds |
The result should look this way:
Setting TXT record for Titan Email
To prevent emails from entering the spam folder you need to set this TXT record:
Name | TXT value | TTL |
@ | v=spf1 include:spf.titan.email ~all | 4 hours/14400 seconds |
All settings are done 👍 As soon as values are propagated (up to 24 hours), your Titan email hosting will be ready to use!