Consumer limits
Gmail caps at 2,000 emails/day. Yahoo around 2,400/day. Bulk campaigns need a professional SMTP relay with monthly volume tiers, not daily caps.
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What is my SMTP server?
The first question when configuring an email client: which SMTP hostname should you use? Free consumer servers are not built for bulk sending — use a dedicated relay like SMTP-X for campaigns and transactional mail at scale.
Popular provider SMTP hostnames
Use these outgoing server names in your email client. For bulk or app sending, switch to SMTP-X SMTP relay — dedicated IPs from €39/month for 100,000 emails.
Provider
SMTP hostname
Gmail
smtp.gmail.com
Outlook.com / Hotmail
smtp-mail.outlook.com
Yahoo Mail
smtp.mail.yahoo.com
Apple iCloud
smtp.mail.me.com
Comcast
smtp.comcast.net
AT&T
smtp.mail.att.net
Verizon
smtp.verizon.net
GMX
mail.gmx.net
1&1 IONOS
smtp.ionos.com
SMTP-X
smtp.smtp-x.com — ports 25 / 587 / 2525
SMTP-X: credentials appear in your dashboard after domain verification. We accept cryptocurrency (USDT, USDC, BTC, ETH and more).
Why use SMTP-X instead of Gmail SMTP?
Dedicated reputation
Every paid SMTP-X plan includes a dedicated IP so your sender reputation is isolated from other senders.
Where are my SMTP-X credentials?
After signup and domain verification, open Dashboard → SMTP settings for hostname, port, username, and password. See installation steps.
Test before sending
Run SMTP Test and Mail Tester after configuring credentials.
Exclusively designed for professional senders.
Free plan: 3,000 emails/month. Paid from €39/month for 100,000 emails with one dedicated IP.
We accept cryptocurrency (USDT, USDC, BTC, ETH and more).