Is email size considered in spam classification?

Yes, spam ﬁlters use email size as an indicator. To increase the chances of emails reaching the inbox, it's generally recommended to keep the email body size between 15 KB and 100 KB.

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Related Articles
Is the subject line considered in email classification?
Yes. The email subject line is a key factor in email classification. Spam ﬁlters analyze it for spammy words, misleading content, or excessive punctuation, which can affect whether the email lands in the inbox or spam folder.
I authenticated my domain, but my emails are still landing in the spam folder. Why?
Domain authentication is an important factor in email classification. However, other factors, such as subject, content, and sender domain reputation, are also considered. We need to analyze the email header ﬁle to pinpoint why your emails are landing ...
Why spam isn’t the end of the road for your email marketing
Many small business marketers hold a misconception that email marketing isn’t effective or worth trying due to their campaigns potentially being marked as spam. If you’re a small business owner who wants to use email marketing for its ...
Can an email's content cause it to land in the spam folder?
Yes. Marketing emails with excessive sales language, misleading subject lines, too many links, redirection links, or poor formatting may trigger spam ﬁlters. Such content increases the email's SCL score, raising the likelihood of it landing in the ...
Does domain age matter in email classification?
Yes. Domain age is considered in email classification. Older domains with established reputations are generally trusted more, while new domains may face stricter scrutiny and a higher chance of emails being marked as spam.