diff --git a/src/config.rs b/src/config.rs
index afa4aa167..d5a165ac3 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -8,6 +8,7 @@ use crate::constants::DC_VERSION_STR;
 use crate::context::Context;
 use crate::dc_tools::*;
 use crate::job::*;
+use crate::mimefactory::RECOMMENDED_FILE_SIZE;
 use crate::stock::StockMessage;
 use rusqlite::NO_PARAMS;
 
@@ -98,7 +99,7 @@ impl Context {
                 rel_path.map(|p| dc_get_abs_path(self, &p).to_string_lossy().into_owned())
             }
             Config::SysVersion => Some((&*DC_VERSION_STR).clone()),
-            Config::SysMsgsizeMaxRecommended => Some(format!("{}", 24 * 1024 * 1024 / 4 * 3)),
+            Config::SysMsgsizeMaxRecommended => Some(format!("{}", RECOMMENDED_FILE_SIZE)),
             Config::SysConfigKeys => Some(get_config_keys_string()),
             _ => self.sql.get_raw_config(self, key),
         };
diff --git a/src/mimefactory.rs b/src/mimefactory.rs
index bec224e4f..cdf576b8c 100644
--- a/src/mimefactory.rs
+++ b/src/mimefactory.rs
@@ -21,7 +21,7 @@ use crate::stock::StockMessage;
 // (brutto examples: web.de=50, 1&1=40, t-online.de=32, gmail=25, posteo=50, yahoo=25, all-inkl=100).
 // as an upper limit, we double the size; the core won't send messages larger than this
 // to get the netto sizes, we subtract 1 mb header-overhead and the base64-overhead.
-const RECOMMENDED_FILE_SIZE: u64 = 24 * 1024 * 1024 / 4 * 3;
+pub const RECOMMENDED_FILE_SIZE: u64 = 24 * 1024 * 1024 / 4 * 3;
 const UPPER_LIMIT_FILE_SIZE: u64 = 49 * 1024 * 1024 / 4 * 3;
 
 #[derive(Debug, Clone)]