On Tue, Sep 03, 2024 at 10:17:22PM +0000, Graeme Slogrove via mailop wrote:
> Microsoft documentation states that they support message headers up to 256KB > > https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits#message-limits:~:text=Message%20header%20size%20limit FWIW, Postfix has no limit on the total size of all headers, other than the overall message size. Individual "logical" (folded) header "lines" are bounded by user-configurable limit, which defaults to 100KB. However, when milters are in use, the per-logical header limit is silently capped at 60000 bytes in aid of compatibility with the milter API, where client requests must not exceed 64KB. The total header length remains unrestricted. -- Viktor. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
