fix(email): enclose PGP encryption logic in try/catch (#2519)

server/lib/email/openpgpEncrypt.ts

@@ -1,6 +1,7 @@
 import { randomBytes } from 'crypto';
 import * as openpgp from 'openpgp';
 import { Transform, TransformCallback } from 'stream';
+import logger from '../../logger';
 
 interface EncryptorOptions {
   signingKey?: string;
@@ -36,10 +37,14 @@ class PGPEncryptor extends Transform {
 
   // Actually do stuff
   _flush = async (callback: TransformCallback): Promise<void> => {
-    // Reconstruct message as buffer
     const message = Buffer.concat(this._messageChunks, this._messageLength);
+
+    try {
+      // Reconstruct message as buffer
       const validPublicKeys = await Promise.all(
-      this._encryptionKeys.map((armoredKey) => openpgp.readKey({ armoredKey }))
+        this._encryptionKeys.map((armoredKey) =>
+          openpgp.readKey({ armoredKey })
+        )
       );
       let privateKey: openpgp.PrivateKey | undefined;
 
@@ -163,6 +168,18 @@ class PGPEncryptor extends Transform {
 
       this.push(Buffer.from(emailHeadersRaw + emailPartDelimiter + body));
       callback();
+    } catch (e) {
+      logger.error(
+        'Something went wrong while encrypting email message with OpenPGP. Sending email without encryption',
+        {
+          label: 'Notifications',
+          errorMessage: e.message,
+        }
+      );
+
+      this.push(message);
+      callback();
+    }
   };
 }