Manage cookies that are used for advertising, such as ad personalization, remarketing, and ad effectiveness analysis.
4.5.3. Maximum size of message
Important points:
- Most popular email services, such as Gmail, accept messages no larger than 25 MB.
- SMTP protocol does not support binary data transmission, so all attached files are encoded using Base64 algorithm, which increases the actual size of the message by 1.5-2 times.
Maximum attachment size when sending via WebMail.Online — 35 MB.
Maximum message size when sent via WebMail classic — 35 MB.