SMTP and Sending Limits for 1and1

EQ Admin

EQ Forum Admin
Staff member
1and1 (1&1) Email Send Rate Limit & SMTP Restrictions

The following restrictions apply when sending emails from a web site / domain hosted by 1and1:
  • 1and1 email send rate limit - max 99 emails at once

  • 1and1 Other SMTP restrictions - each outgoing message must have less than 50Mb (including attachments)