![]() limit to retrieve a message (your recipients’ mail system).įor example, if your email service is able to send messages up to 15 MB but the email recipient can retrieve messages only up to 10 MB, it’s obvious that your email should not exceed 10MB.limit to send a message (your email system).When preparing either transactional or marketing emails, you should consider two limits: ![]() This makes them candidates for DoS (denial of service) attacks: a huge amount of large messages can take the whole system down. Email systems usually use a limited number of ports to retrieve data. Points 1 and 2 on our list also lead to potential security vulnerabilities. This is why not only the message itself but also the inbox as a whole has its own limits. Email data should be stored on a server (either cloud or local). In addition, mail transfer agents often scan incoming data for viruses and other potential risks, which also takes resources and affects system performance. Most of the systems are not able to process multiple data sources at once. They deal with SMTP, which is a quite outdated protocol. Email systems are not designed to transfer large volumes of data. What are the common issues and errors related to email size and how to handle them?Įmail size limits are used for three main reasons:.How do the embedded images affect email size, spam score, and deliverability?.What are the limits of different email clients and sending providers?. ![]()
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