Warmup Inbox does allow SendGrid warmup. Before connecting you need to:
1. Sign up for a SendGrid account
2. Create and store a SendGrid API key with full access "Mail Send" permissions.
3. Verify your Sender Identity
Once complete, here are the SMTP settings you should do.
SMTP ONLY Option
Email Provider: SendGrid email
SMTP Settings:
• SMTP Username: apikey
• SMTP Password: {{your SendGrid api key}}
• SMTP Host: smtp.sendgrid.net
• SMTP Port: 465 (or 587)
• SSL/TLS: ON (with port 587 SSL/TLS needs to be turned OFF)
Once you have this information, you can get set up on Warmup Inbox by selecting the SendGrid integration option.
Please note, that you can use the SendGrid integration only if you have purchased the Send-only plan.
Alternatively, you can find your IMAP in your email provider settings and connect the SMTP with IMAP accordingly:
SMTP & IMAP Option
With the trial, Basic, Pro, and MAX plans, you can connect your SendGrid account only when creating an IMAP connection.
The email address for the IMAP connection must be the same email address as the one you specified in the SMTP.
In this case, instead of using the SendGrid integration, you will connect your inbox using the SMTP & IMAP option.
Here are the instructions on how you can do that:
For the SMTP part, you will use these instructions:
https://help.warmupinbox.com/en/articles/4770420-configure-inbox-for-sendgrid
For the IMAP part, you will need to gather this information from the inbox that will be receiving emails :
IMAP username: the email address of the inbox that will be receiving emails
IMAP password: the password from this inbox. If it´s a Google inbox, you will need to create an app password and use it instead of the regular password from your inbox.
Here are the instructions:
https://help.warmupinbox.com/en/articles/4934806-configure-for-google-workplace-with-two-factor-authentication-2fa?location=conversation
IMAP host:
IMAP port: typically 993 (or you can use 143)
SSL/TLS: using port 993 - ON, using port 143 - OFF
Note: the SMTP/IMAP option doesn´t work with Office365 accounts as they disabled the Basic authentication in 2023.