SMTP Providers

SendGrail includes pre-configured templates for 13 popular SMTP providers plus a custom SMTP option. When you select a provider, the host, port, and encryption fields are automatically filled in. You only need to supply your credentials.

Provider Reference

Gmail

Setting	Value
Host	smtp.gmail.com
Port	587
Encryption	TLS
Username	Your full Gmail address
Password	App Password

WARNING

Gmail requires an App Password if two-factor authentication is enabled (which it should be). Generate one at myaccount.google.com/apppasswords. Your regular Google password will not work.

Gmail has a sending limit of 500 emails per day for personal accounts and 2,000 per day for Google Workspace accounts.

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Outlook / Microsoft 365

Setting	Value
Host	smtp.office365.com
Port	587
Encryption	TLS
Username	Your full Outlook email
Password	Your account password

For Microsoft 365 business accounts, ensure SMTP AUTH is enabled for the mailbox in the Microsoft 365 admin center under Active users > Mail > Manage email apps.

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Yahoo Mail

Setting	Value
Host	smtp.mail.yahoo.com
Port	587
Encryption	TLS
Username	Your full Yahoo email
Password	App Password

WARNING

Yahoo requires an App Password. Generate one from Account Info > Account Security > Generate app password. Standard account passwords are rejected for SMTP.

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SendGrid

Setting	Value
Host	smtp.sendgrid.net
Port	587
Encryption	TLS
Username	apikey (literal string)
Password	Your SendGrid API key

The username is always the literal text apikey -- do not enter your email address. Generate an API key from Settings > API Keys in the SendGrid dashboard. The key must have Mail Send permissions.

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Mailgun

Setting	Value
Host	smtp.mailgun.org
Port	587
Encryption	TLS
Username	SMTP username from Mailgun domain settings
Password	SMTP password from Mailgun domain settings

Find your SMTP credentials in the Mailgun dashboard under Sending > Domain settings > SMTP credentials. The username is typically in the format postmaster@your-domain.com. Do not use your Mailgun account password.

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Amazon SES

Setting	Value
Host	email-smtp.{region}.amazonaws.com
Port	587
Encryption	TLS
Username	SES SMTP username (from IAM credentials)
Password	SES SMTP password (from IAM credentials)

TIP

Replace {region} with your AWS region (e.g., us-east-1, eu-west-1). The host field is editable so you can specify the correct regional endpoint.

SES SMTP credentials are not the same as your AWS access keys. Generate them from the Amazon SES console > SMTP settings > Create SMTP credentials. Make sure your sending domain and email addresses are verified in SES.

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Postmark

Setting	Value
Host	smtp.postmarkapp.com
Port	587
Encryption	TLS
Username	Your Server API Token
Password	Your Server API Token

Postmark uses the same Server API Token for both the username and password fields. Find it in your Postmark server under Settings > API Tokens.

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Mandrill (Mailchimp Transactional)

Setting	Value
Host	smtp.mandrillapp.com
Port	587
Encryption	TLS
Username	Your Mailchimp email
Password	Your Mandrill API key

INFO

Mandrill is a paid add-on to Mailchimp. You must have an active Mailchimp account with the Transactional Email (Mandrill) add-on enabled. Generate an API key from the Mandrill dashboard under Settings > SMTP & API Info.

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Elastic Email

Setting	Value
Host	smtp.elasticemail.com
Port	2525
Encryption	TLS
Username	Your Elastic Email address
Password	Your SMTP password

Generate SMTP credentials from Settings > SMTP in the Elastic Email dashboard. Note the non-standard port 2525.

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SMTP2GO

Setting	Value
Host	mail.smtp2go.com
Port	2525
Encryption	TLS
Username	Your SMTP2GO username
Password	Your SMTP2GO password

Create SMTP credentials from the SMTP2GO dashboard under Settings > SMTP Users. Port 2525 is used by default to avoid ISP blocking of standard ports.

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Mailtrap

Setting	Value
Host	live.smtp.mailtrap.io (production) or sandbox.smtp.mailtrap.io (testing)
Port	587
Encryption	TLS
Username	Your Mailtrap SMTP username
Password	Your Mailtrap SMTP password

TIP

Mailtrap offers two environments. Use live.smtp.mailtrap.io for production email delivery and sandbox.smtp.mailtrap.io for development and testing. The sandbox catches all emails without delivering them to real recipients.

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Zoho Mail

Setting	Value
Host	smtp.zoho.com
Port	587
Encryption	TLS
Username	Your full Zoho email
Password	Your password or App Password

WARNING

If two-factor authentication is enabled on your Zoho account, you must generate an App Password from Zoho Account > Security > App Passwords. Your regular password will not work with 2FA active.

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Brevo (formerly Sendinblue)

Setting	Value
Host	smtp-relay.brevo.com
Port	587
Encryption	TLS
Username	Your Brevo account email
Password	Your SMTP key

Find your SMTP key in the Brevo dashboard under Settings > SMTP & API > SMTP. This is not your account password -- it is a separate SMTP-specific key.

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Custom SMTP

Setting	Value
Host	Your SMTP server hostname
Port	Your SMTP server port
Encryption	None, SSL, or TLS
Username	Your SMTP username
Password	Your SMTP password

Use the Custom SMTP option to connect to any SMTP server not listed above. All fields are fully editable. Common port and encryption combinations:

Port	Encryption	Notes
25	None	Unencrypted, often blocked
465	SSL	Implicit TLS (legacy)
587	TLS	STARTTLS, recommended
2525	TLS	Alternative to avoid blocks

Quick Reference

Provider	Host	Port	Encryption
Gmail	smtp.gmail.com	587	TLS
Outlook / Microsoft 365	smtp.office365.com	587	TLS
Yahoo Mail	smtp.mail.yahoo.com	587	TLS
SendGrid	smtp.sendgrid.net	587	TLS
Mailgun	smtp.mailgun.org	587	TLS
Amazon SES	email-smtp.{region}.amazonaws.com	587	TLS
Postmark	smtp.postmarkapp.com	587	TLS
Mandrill	smtp.mandrillapp.com	587	TLS
Elastic Email	smtp.elasticemail.com	2525	TLS
SMTP2GO	mail.smtp2go.com	2525	TLS
Mailtrap (Production)	live.smtp.mailtrap.io	587	TLS
Mailtrap (Sandbox)	sandbox.smtp.mailtrap.io	587	TLS
Zoho Mail	smtp.zoho.com	587	TLS
Brevo	smtp-relay.brevo.com	587	TLS